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[media] media: i2c: adv7604: Use v4l2-dv-timings helpers
[deliverable/linux.git] / drivers / media / v4l2-core / v4l2-ctrls.c
CommitLineData
0996517c
HV		 1/*
2 V4L2 controls framework implementation.
3
4 Copyright (C) 2010 Hans Verkuil <hverkuil@xs4all.nl>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21#include <linux/ctype.h>
2b80163c 22#include <linux/slab.h>
35a24636 23#include <linux/export.h>
0996517c
HV		 24#include <media/v4l2-ioctl.h>
25#include <media/v4l2-device.h>
26#include <media/v4l2-ctrls.h>
6e239399 27#include <media/v4l2-event.h>
0996517c
HV		 28#include <media/v4l2-dev.h>
29
ddac5c10
HV		 30#define has_op(master, op) \
31 (master->ops && master->ops->op)
54c911eb 32#define call_op(master, op) \
ddac5c10 33 (has_op(master, op) ? master->ops->op(master) : 0)
54c911eb 34
0996517c 35/* Internal temporary helper struct, one for each v4l2_ext_control */
eb5b16ef
HV		 36struct v4l2_ctrl_helper {
37 /* Pointer to the control reference of the master control */
38 struct v4l2_ctrl_ref *mref;
0996517c
HV		 39 /* The control corresponding to the v4l2_ext_control ID field. */
40 struct v4l2_ctrl *ctrl;
eb5b16ef
HV		 41 /* v4l2_ext_control index of the next control belonging to the
42 same cluster, or 0 if there isn't any. */
43 u32 next;
0996517c
HV		 44};
45
72d877ca 46/* Small helper function to determine if the autocluster is set to manual
88365105 47 mode. */
72d877ca
HV		 48static bool is_cur_manual(const struct v4l2_ctrl *master)
49{
50 return master->is_auto && master->cur.val == master->manual_mode_value;
51}
52
53/* Same as above, but this checks the against the new value instead of the
54 current value. */
55static bool is_new_manual(const struct v4l2_ctrl *master)
56{
57 return master->is_auto && master->val == master->manual_mode_value;
58}
59
0996517c
HV		 60/* Returns NULL or a character pointer array containing the menu for
61 the given control ID. The pointer array ends with a NULL pointer.
62 An empty string signifies a menu entry that is invalid. This allows
63 drivers to disable certain options if it is not supported. */
513521ea 64const char * const *v4l2_ctrl_get_menu(u32 id)
0996517c 65{
513521ea 66 static const char * const mpeg_audio_sampling_freq[] = {
0996517c
HV		 67 "44.1 kHz",
68 "48 kHz",
69 "32 kHz",
70 NULL
71 };
513521ea 72 static const char * const mpeg_audio_encoding[] = {
0996517c
HV		 73 "MPEG-1/2 Layer I",
74 "MPEG-1/2 Layer II",
75 "MPEG-1/2 Layer III",
76 "MPEG-2/4 AAC",
77 "AC-3",
78 NULL
79 };
513521ea 80 static const char * const mpeg_audio_l1_bitrate[] = {
0996517c
HV		 81 "32 kbps",
82 "64 kbps",
83 "96 kbps",
84 "128 kbps",
85 "160 kbps",
86 "192 kbps",
87 "224 kbps",
88 "256 kbps",
89 "288 kbps",
90 "320 kbps",
91 "352 kbps",
92 "384 kbps",
93 "416 kbps",
94 "448 kbps",
95 NULL
96 };
513521ea 97 static const char * const mpeg_audio_l2_bitrate[] = {
0996517c
HV		 98 "32 kbps",
99 "48 kbps",
100 "56 kbps",
101 "64 kbps",
102 "80 kbps",
103 "96 kbps",
104 "112 kbps",
105 "128 kbps",
106 "160 kbps",
107 "192 kbps",
108 "224 kbps",
109 "256 kbps",
110 "320 kbps",
111 "384 kbps",
112 NULL
113 };
513521ea 114 static const char * const mpeg_audio_l3_bitrate[] = {
0996517c
HV		 115 "32 kbps",
116 "40 kbps",
117 "48 kbps",
118 "56 kbps",
119 "64 kbps",
120 "80 kbps",
121 "96 kbps",
122 "112 kbps",
123 "128 kbps",
124 "160 kbps",
125 "192 kbps",
126 "224 kbps",
127 "256 kbps",
128 "320 kbps",
129 NULL
130 };
513521ea 131 static const char * const mpeg_audio_ac3_bitrate[] = {
0996517c
HV		 132 "32 kbps",
133 "40 kbps",
134 "48 kbps",
135 "56 kbps",
136 "64 kbps",
137 "80 kbps",
138 "96 kbps",
139 "112 kbps",
140 "128 kbps",
141 "160 kbps",
142 "192 kbps",
143 "224 kbps",
144 "256 kbps",
145 "320 kbps",
146 "384 kbps",
147 "448 kbps",
148 "512 kbps",
149 "576 kbps",
150 "640 kbps",
151 NULL
152 };
513521ea 153 static const char * const mpeg_audio_mode[] = {
0996517c
HV		 154 "Stereo",
155 "Joint Stereo",
156 "Dual",
157 "Mono",
158 NULL
159 };
513521ea 160 static const char * const mpeg_audio_mode_extension[] = {
0996517c
HV		 161 "Bound 4",
162 "Bound 8",
163 "Bound 12",
164 "Bound 16",
165 NULL
166 };
513521ea 167 static const char * const mpeg_audio_emphasis[] = {
0996517c
HV		 168 "No Emphasis",
169 "50/15 us",
170 "CCITT J17",
171 NULL
172 };
513521ea 173 static const char * const mpeg_audio_crc[] = {
0996517c
HV		 174 "No CRC",
175 "16-bit CRC",
176 NULL
177 };
24c19a21
HV		 178 static const char * const mpeg_audio_dec_playback[] = {
179 "Auto",
180 "Stereo",
181 "Left",
182 "Right",
183 "Mono",
184 "Swapped Stereo",
185 NULL
186 };
513521ea 187 static const char * const mpeg_video_encoding[] = {
0996517c
HV		 188 "MPEG-1",
189 "MPEG-2",
190 "MPEG-4 AVC",
191 NULL
192 };
513521ea 193 static const char * const mpeg_video_aspect[] = {
0996517c
HV		 194 "1x1",
195 "4x3",
196 "16x9",
197 "2.21x1",
198 NULL
199 };
513521ea 200 static const char * const mpeg_video_bitrate_mode[] = {
0996517c
HV		 201 "Variable Bitrate",
202 "Constant Bitrate",
203 NULL
204 };
513521ea 205 static const char * const mpeg_stream_type[] = {
0996517c
HV		 206 "MPEG-2 Program Stream",
207 "MPEG-2 Transport Stream",
208 "MPEG-1 System Stream",
209 "MPEG-2 DVD-compatible Stream",
210 "MPEG-1 VCD-compatible Stream",
211 "MPEG-2 SVCD-compatible Stream",
212 NULL
213 };
513521ea 214 static const char * const mpeg_stream_vbi_fmt[] = {
0996517c 215 "No VBI",
064f5096 216 "Private Packet, IVTV Format",
0996517c
HV		 217 NULL
218 };
513521ea 219 static const char * const camera_power_line_frequency[] = {
0996517c
HV		 220 "Disabled",
221 "50 Hz",
222 "60 Hz",
d26a6635 223 "Auto",
0996517c
HV		 224 NULL
225 };
513521ea 226 static const char * const camera_exposure_auto[] = {
0996517c
HV		 227 "Auto Mode",
228 "Manual Mode",
229 "Shutter Priority Mode",
230 "Aperture Priority Mode",
231 NULL
232 };
cf072139
SN		 233 static const char * const camera_exposure_metering[] = {
234 "Average",
235 "Center Weighted",
236 "Spot",
fc39f46b 237 "Matrix",
cf072139
SN		 238 NULL
239 };
2272ab65
SN		 240 static const char * const camera_auto_focus_range[] = {
241 "Auto",
242 "Normal",
243 "Macro",
244 "Infinity",
245 NULL
246 };
513521ea 247 static const char * const colorfx[] = {
0996517c
HV		 248 "None",
249 "Black & White",
250 "Sepia",
251 "Negative",
252 "Emboss",
253 "Sketch",
064f5096
KD		 254 "Sky Blue",
255 "Grass Green",
256 "Skin Whiten",
0996517c 257 "Vivid",
6491d1ad
SN		 258 "Aqua",
259 "Art Freeze",
260 "Silhouette",
261 "Solarization",
262 "Antique",
263 "Set Cb/Cr",
0996517c
HV		 264 NULL
265 };
e40a0573
SN		 266 static const char * const auto_n_preset_white_balance[] = {
267 "Manual",
268 "Auto",
269 "Incandescent",
270 "Fluorescent",
271 "Fluorescent H",
272 "Horizon",
273 "Daylight",
274 "Flash",
275 "Cloudy",
276 "Shade",
277 NULL,
278 };
7f84ad8b
SN		 279 static const char * const camera_iso_sensitivity_auto[] = {
280 "Manual",
281 "Auto",
282 NULL
283 };
0bf6b7dc
SN		 284 static const char * const scene_mode[] = {
285 "None",
286 "Backlight",
287 "Beach/Snow",
288 "Candle Light",
289 "Dusk/Dawn",
290 "Fall Colors",
291 "Fireworks",
292 "Landscape",
293 "Night",
294 "Party/Indoor",
295 "Portrait",
296 "Sports",
297 "Sunset",
298 "Text",
299 NULL
300 };
aec330a8
AS		 301 static const char * const tune_emphasis[] = {
302 "None",
f769c260
HV		 303 "50 Microseconds",
304 "75 Microseconds",
0996517c
HV		 305 NULL,
306 };
064f5096
KD		 307 static const char * const header_mode[] = {
308 "Separate Buffer",
309 "Joined With 1st Frame",
310 NULL,
311 };
312 static const char * const multi_slice[] = {
313 "Single",
314 "Max Macroblocks",
315 "Max Bytes",
316 NULL,
317 };
318 static const char * const entropy_mode[] = {
319 "CAVLC",
320 "CABAC",
321 NULL,
322 };
323 static const char * const mpeg_h264_level[] = {
324 "1",
325 "1b",
326 "1.1",
327 "1.2",
328 "1.3",
329 "2",
330 "2.1",
331 "2.2",
332 "3",
333 "3.1",
334 "3.2",
335 "4",
336 "4.1",
337 "4.2",
338 "5",
339 "5.1",
340 NULL,
341 };
342 static const char * const h264_loop_filter[] = {
343 "Enabled",
344 "Disabled",
345 "Disabled at Slice Boundary",
346 NULL,
347 };
348 static const char * const h264_profile[] = {
349 "Baseline",
350 "Constrained Baseline",
351 "Main",
352 "Extended",
353 "High",
354 "High 10",
355 "High 422",
356 "High 444 Predictive",
357 "High 10 Intra",
358 "High 422 Intra",
359 "High 444 Intra",
360 "CAVLC 444 Intra",
361 "Scalable Baseline",
362 "Scalable High",
363 "Scalable High Intra",
364 "Multiview High",
365 NULL,
366 };
367 static const char * const vui_sar_idc[] = {
368 "Unspecified",
369 "1:1",
370 "12:11",
371 "10:11",
372 "16:11",
373 "40:33",
374 "24:11",
375 "20:11",
376 "32:11",
377 "80:33",
378 "18:11",
379 "15:11",
380 "64:33",
381 "160:99",
382 "4:3",
383 "3:2",
384 "2:1",
385 "Extended SAR",
386 NULL,
387 };
2e81dde9
AK		 388 static const char * const h264_fp_arrangement_type[] = {
389 "Checkerboard",
390 "Column",
391 "Row",
392 "Side by Side",
393 "Top Bottom",
394 "Temporal",
395 NULL,
396 };
397 static const char * const h264_fmo_map_type[] = {
398 "Interleaved Slices",
399 "Scattered Slices",
400 "Foreground with Leftover",
401 "Box Out",
402 "Raster Scan",
403 "Wipe Scan",
404 "Explicit",
405 NULL,
406 };
064f5096
KD		 407 static const char * const mpeg_mpeg4_level[] = {
408 "0",
409 "0b",
410 "1",
411 "2",
412 "3",
413 "3b",
414 "4",
415 "5",
416 NULL,
417 };
418 static const char * const mpeg4_profile[] = {
419 "Simple",
f769c260 420 "Advanced Simple",
064f5096
KD		 421 "Core",
422 "Simple Scalable",
39c1cb2b 423 "Advanced Coding Efficiency",
064f5096
KD		 424 NULL,
425 };
426
bc9028e1
AK		 427 static const char * const vpx_golden_frame_sel[] = {
428 "Use Previous Frame",
429 "Use Previous Specific Frame",
430 NULL,
431 };
432
0b159acd
SA		 433 static const char * const flash_led_mode[] = {
434 "Off",
435 "Flash",
436 "Torch",
437 NULL,
438 };
439 static const char * const flash_strobe_source[] = {
440 "Software",
441 "External",
442 NULL,
443 };
0996517c 444
c7361ae1
SN		 445 static const char * const jpeg_chroma_subsampling[] = {
446 "4:4:4",
447 "4:2:2",
448 "4:2:0",
449 "4:1:1",
450 "4:1:0",
451 "Gray",
452 NULL,
453 };
977ebec7
HV		 454 static const char * const dv_tx_mode[] = {
455 "DVI-D",
456 "HDMI",
457 NULL,
458 };
459 static const char * const dv_rgb_range[] = {
460 "Automatic",
461 "RGB limited range (16-235)",
462 "RGB full range (0-255)",
463 NULL,
464 };
a77b4fc0
HV		 465 static const char * const detect_md_mode[] = {
466 "Disabled",
467 "Global",
468 "Threshold Grid",
469 "Region Grid",
470 NULL,
471 };
977ebec7 472
c7361ae1 473
0996517c
HV		 474 switch (id) {
475 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
476 return mpeg_audio_sampling_freq;
477 case V4L2_CID_MPEG_AUDIO_ENCODING:
478 return mpeg_audio_encoding;
479 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
480 return mpeg_audio_l1_bitrate;
481 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
482 return mpeg_audio_l2_bitrate;
483 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
484 return mpeg_audio_l3_bitrate;
485 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
486 return mpeg_audio_ac3_bitrate;
487 case V4L2_CID_MPEG_AUDIO_MODE:
488 return mpeg_audio_mode;
489 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
490 return mpeg_audio_mode_extension;
491 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
492 return mpeg_audio_emphasis;
493 case V4L2_CID_MPEG_AUDIO_CRC:
494 return mpeg_audio_crc;
24c19a21
HV		 495 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
496 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
497 return mpeg_audio_dec_playback;
0996517c
HV		 498 case V4L2_CID_MPEG_VIDEO_ENCODING:
499 return mpeg_video_encoding;
500 case V4L2_CID_MPEG_VIDEO_ASPECT:
501 return mpeg_video_aspect;
502 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
503 return mpeg_video_bitrate_mode;
504 case V4L2_CID_MPEG_STREAM_TYPE:
505 return mpeg_stream_type;
506 case V4L2_CID_MPEG_STREAM_VBI_FMT:
507 return mpeg_stream_vbi_fmt;
508 case V4L2_CID_POWER_LINE_FREQUENCY:
509 return camera_power_line_frequency;
510 case V4L2_CID_EXPOSURE_AUTO:
511 return camera_exposure_auto;
cf072139
SN		 512 case V4L2_CID_EXPOSURE_METERING:
513 return camera_exposure_metering;
2272ab65
SN		 514 case V4L2_CID_AUTO_FOCUS_RANGE:
515 return camera_auto_focus_range;
0996517c
HV		 516 case V4L2_CID_COLORFX:
517 return colorfx;
e40a0573
SN		 518 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
519 return auto_n_preset_white_balance;
7f84ad8b
SN		 520 case V4L2_CID_ISO_SENSITIVITY_AUTO:
521 return camera_iso_sensitivity_auto;
0bf6b7dc
SN		 522 case V4L2_CID_SCENE_MODE:
523 return scene_mode;
0996517c 524 case V4L2_CID_TUNE_PREEMPHASIS:
aec330a8
AS		 525 return tune_emphasis;
526 case V4L2_CID_TUNE_DEEMPHASIS:
527 return tune_emphasis;
0b159acd
SA		 528 case V4L2_CID_FLASH_LED_MODE:
529 return flash_led_mode;
530 case V4L2_CID_FLASH_STROBE_SOURCE:
531 return flash_strobe_source;
064f5096
KD		 532 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
533 return header_mode;
534 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
535 return multi_slice;
536 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
537 return entropy_mode;
538 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
539 return mpeg_h264_level;
540 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
541 return h264_loop_filter;
542 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
543 return h264_profile;
544 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
545 return vui_sar_idc;
2e81dde9
AK		 546 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
547 return h264_fp_arrangement_type;
548 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
549 return h264_fmo_map_type;
064f5096
KD		 550 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
551 return mpeg_mpeg4_level;
552 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
553 return mpeg4_profile;
bc9028e1
AK		 554 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
555 return vpx_golden_frame_sel;
c7361ae1
SN		 556 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
557 return jpeg_chroma_subsampling;
977ebec7
HV		 558 case V4L2_CID_DV_TX_MODE:
559 return dv_tx_mode;
560 case V4L2_CID_DV_TX_RGB_RANGE:
561 case V4L2_CID_DV_RX_RGB_RANGE:
562 return dv_rgb_range;
a77b4fc0
HV		 563 case V4L2_CID_DETECT_MD_MODE:
564 return detect_md_mode;
c7361ae1 565
0996517c
HV		 566 default:
567 return NULL;
568 }
569}
570EXPORT_SYMBOL(v4l2_ctrl_get_menu);
571
bc9028e1 572#define __v4l2_qmenu_int_len(arr, len) ({ *(len) = ARRAY_SIZE(arr); arr; })
d1e9b7c1
SN		 573/*
574 * Returns NULL or an s64 type array containing the menu for given
575 * control ID. The total number of the menu items is returned in @len.
576 */
4eed9b33 577const s64 *v4l2_ctrl_get_int_menu(u32 id, u32 *len)
d1e9b7c1 578{
4eed9b33 579 static const s64 qmenu_int_vpx_num_partitions[] = {
bc9028e1
AK		 580 1, 2, 4, 8,
581 };
582
4eed9b33 583 static const s64 qmenu_int_vpx_num_ref_frames[] = {
bc9028e1
AK		 584 1, 2, 3,
585 };
586
d1e9b7c1 587 switch (id) {
bc9028e1
AK		 588 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
589 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_partitions, len);
590 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
591 return __v4l2_qmenu_int_len(qmenu_int_vpx_num_ref_frames, len);
d1e9b7c1
SN		 592 default:
593 *len = 0;
594 return NULL;
2028c71d 595 }
d1e9b7c1
SN		 596}
597EXPORT_SYMBOL(v4l2_ctrl_get_int_menu);
598
0996517c
HV		 599/* Return the control name. */
600const char *v4l2_ctrl_get_name(u32 id)
601{
602 switch (id) {
603 /* USER controls */
59253f29 604 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
6dd5aff3
MCC		 605 case V4L2_CID_USER_CLASS: return "User Controls";
606 case V4L2_CID_BRIGHTNESS: return "Brightness";
607 case V4L2_CID_CONTRAST: return "Contrast";
608 case V4L2_CID_SATURATION: return "Saturation";
609 case V4L2_CID_HUE: return "Hue";
610 case V4L2_CID_AUDIO_VOLUME: return "Volume";
611 case V4L2_CID_AUDIO_BALANCE: return "Balance";
612 case V4L2_CID_AUDIO_BASS: return "Bass";
613 case V4L2_CID_AUDIO_TREBLE: return "Treble";
614 case V4L2_CID_AUDIO_MUTE: return "Mute";
615 case V4L2_CID_AUDIO_LOUDNESS: return "Loudness";
0996517c
HV		 616 case V4L2_CID_BLACK_LEVEL: return "Black Level";
617 case V4L2_CID_AUTO_WHITE_BALANCE: return "White Balance, Automatic";
618 case V4L2_CID_DO_WHITE_BALANCE: return "Do White Balance";
619 case V4L2_CID_RED_BALANCE: return "Red Balance";
620 case V4L2_CID_BLUE_BALANCE: return "Blue Balance";
621 case V4L2_CID_GAMMA: return "Gamma";
622 case V4L2_CID_EXPOSURE: return "Exposure";
623 case V4L2_CID_AUTOGAIN: return "Gain, Automatic";
624 case V4L2_CID_GAIN: return "Gain";
625 case V4L2_CID_HFLIP: return "Horizontal Flip";
626 case V4L2_CID_VFLIP: return "Vertical Flip";
0996517c
HV		 627 case V4L2_CID_POWER_LINE_FREQUENCY: return "Power Line Frequency";
628 case V4L2_CID_HUE_AUTO: return "Hue, Automatic";
629 case V4L2_CID_WHITE_BALANCE_TEMPERATURE: return "White Balance Temperature";
630 case V4L2_CID_SHARPNESS: return "Sharpness";
631 case V4L2_CID_BACKLIGHT_COMPENSATION: return "Backlight Compensation";
632 case V4L2_CID_CHROMA_AGC: return "Chroma AGC";
0996517c
HV		 633 case V4L2_CID_COLOR_KILLER: return "Color Killer";
634 case V4L2_CID_COLORFX: return "Color Effects";
635 case V4L2_CID_AUTOBRIGHTNESS: return "Brightness, Automatic";
636 case V4L2_CID_BAND_STOP_FILTER: return "Band-Stop Filter";
637 case V4L2_CID_ROTATE: return "Rotate";
638 case V4L2_CID_BG_COLOR: return "Background Color";
6c8d6111 639 case V4L2_CID_CHROMA_GAIN: return "Chroma Gain";
008d35f2
JFM		 640 case V4L2_CID_ILLUMINATORS_1: return "Illuminator 1";
641 case V4L2_CID_ILLUMINATORS_2: return "Illuminator 2";
f08aacf8
HV		 642 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE: return "Min Number of Capture Buffers";
643 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT: return "Min Number of Output Buffers";
cc1d3272 644 case V4L2_CID_ALPHA_COMPONENT: return "Alpha Component";
6491d1ad 645 case V4L2_CID_COLORFX_CBCR: return "Color Effects, CbCr";
0996517c 646
bc9028e1
AK		 647 /* Codec controls */
648 /* The MPEG controls are applicable to all codec controls
649 * and the 'MPEG' part of the define is historical */
6c8d6111 650 /* Keep the order of the 'case's the same as in videodev2.h! */
bc9028e1 651 case V4L2_CID_MPEG_CLASS: return "Codec Controls";
6dd5aff3
MCC		 652 case V4L2_CID_MPEG_STREAM_TYPE: return "Stream Type";
653 case V4L2_CID_MPEG_STREAM_PID_PMT: return "Stream PMT Program ID";
654 case V4L2_CID_MPEG_STREAM_PID_AUDIO: return "Stream Audio Program ID";
655 case V4L2_CID_MPEG_STREAM_PID_VIDEO: return "Stream Video Program ID";
656 case V4L2_CID_MPEG_STREAM_PID_PCR: return "Stream PCR Program ID";
6c8d6111
HV		 657 case V4L2_CID_MPEG_STREAM_PES_ID_AUDIO: return "Stream PES Audio ID";
658 case V4L2_CID_MPEG_STREAM_PES_ID_VIDEO: return "Stream PES Video ID";
659 case V4L2_CID_MPEG_STREAM_VBI_FMT: return "Stream VBI Format";
0996517c 660 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ: return "Audio Sampling Frequency";
6dd5aff3
MCC		 661 case V4L2_CID_MPEG_AUDIO_ENCODING: return "Audio Encoding";
662 case V4L2_CID_MPEG_AUDIO_L1_BITRATE: return "Audio Layer I Bitrate";
663 case V4L2_CID_MPEG_AUDIO_L2_BITRATE: return "Audio Layer II Bitrate";
664 case V4L2_CID_MPEG_AUDIO_L3_BITRATE: return "Audio Layer III Bitrate";
665 case V4L2_CID_MPEG_AUDIO_MODE: return "Audio Stereo Mode";
0996517c 666 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION: return "Audio Stereo Mode Extension";
6dd5aff3
MCC		 667 case V4L2_CID_MPEG_AUDIO_EMPHASIS: return "Audio Emphasis";
668 case V4L2_CID_MPEG_AUDIO_CRC: return "Audio CRC";
669 case V4L2_CID_MPEG_AUDIO_MUTE: return "Audio Mute";
670 case V4L2_CID_MPEG_AUDIO_AAC_BITRATE: return "Audio AAC Bitrate";
671 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE: return "Audio AC-3 Bitrate";
24c19a21
HV		 672 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK: return "Audio Playback";
673 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK: return "Audio Multilingual Playback";
6dd5aff3
MCC		 674 case V4L2_CID_MPEG_VIDEO_ENCODING: return "Video Encoding";
675 case V4L2_CID_MPEG_VIDEO_ASPECT: return "Video Aspect";
676 case V4L2_CID_MPEG_VIDEO_B_FRAMES: return "Video B Frames";
677 case V4L2_CID_MPEG_VIDEO_GOP_SIZE: return "Video GOP Size";
678 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE: return "Video GOP Closure";
679 case V4L2_CID_MPEG_VIDEO_PULLDOWN: return "Video Pulldown";
680 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE: return "Video Bitrate Mode";
681 case V4L2_CID_MPEG_VIDEO_BITRATE: return "Video Bitrate";
682 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK: return "Video Peak Bitrate";
0996517c 683 case V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION: return "Video Temporal Decimation";
6dd5aff3 684 case V4L2_CID_MPEG_VIDEO_MUTE: return "Video Mute";
0996517c 685 case V4L2_CID_MPEG_VIDEO_MUTE_YUV: return "Video Mute YUV";
064f5096
KD		 686 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE: return "Decoder Slice Interface";
687 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER: return "MPEG4 Loop Filter Enable";
f08aacf8 688 case V4L2_CID_MPEG_VIDEO_CYCLIC_INTRA_REFRESH_MB: return "Number of Intra Refresh MBs";
064f5096
KD		 689 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE: return "Frame Level Rate Control Enable";
690 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
691 case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
f08aacf8 692 case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
064f5096 693 case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
f08aacf8
HV		 694 case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
695 case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
064f5096
KD		 696 case V4L2_CID_MPEG_VIDEO_H263_MIN_QP: return "H263 Minimum QP Value";
697 case V4L2_CID_MPEG_VIDEO_H263_MAX_QP: return "H263 Maximum QP Value";
698 case V4L2_CID_MPEG_VIDEO_H264_I_FRAME_QP: return "H264 I-Frame QP Value";
f08aacf8
HV		 699 case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_QP: return "H264 P-Frame QP Value";
700 case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_QP: return "H264 B-Frame QP Value";
064f5096
KD		 701 case V4L2_CID_MPEG_VIDEO_H264_MAX_QP: return "H264 Maximum QP Value";
702 case V4L2_CID_MPEG_VIDEO_H264_MIN_QP: return "H264 Minimum QP Value";
703 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM: return "H264 8x8 Transform Enable";
704 case V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE: return "H264 CPB Buffer Size";
f08aacf8
HV		 705 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE: return "H264 Entropy Mode";
706 case V4L2_CID_MPEG_VIDEO_H264_I_PERIOD: return "H264 I-Frame Period";
064f5096
KD		 707 case V4L2_CID_MPEG_VIDEO_H264_LEVEL: return "H264 Level";
708 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_ALPHA: return "H264 Loop Filter Alpha Offset";
709 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_BETA: return "H264 Loop Filter Beta Offset";
710 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE: return "H264 Loop Filter Mode";
711 case V4L2_CID_MPEG_VIDEO_H264_PROFILE: return "H264 Profile";
712 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_HEIGHT: return "Vertical Size of SAR";
713 case V4L2_CID_MPEG_VIDEO_H264_VUI_EXT_SAR_WIDTH: return "Horizontal Size of SAR";
714 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE: return "Aspect Ratio VUI Enable";
715 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC: return "VUI Aspect Ratio IDC";
2e81dde9
AK		 716 case V4L2_CID_MPEG_VIDEO_H264_SEI_FRAME_PACKING: return "H264 Enable Frame Packing SEI";
717 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_CURRENT_FRAME_0: return "H264 Set Curr. Frame as Frame0";
718 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE: return "H264 FP Arrangement Type";
719 case V4L2_CID_MPEG_VIDEO_H264_FMO: return "H264 Flexible MB Ordering";
720 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE: return "H264 Map Type for FMO";
721 case V4L2_CID_MPEG_VIDEO_H264_FMO_SLICE_GROUP: return "H264 FMO Number of Slice Groups";
722 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_DIRECTION: return "H264 FMO Direction of Change";
723 case V4L2_CID_MPEG_VIDEO_H264_FMO_CHANGE_RATE: return "H264 FMO Size of 1st Slice Grp";
724 case V4L2_CID_MPEG_VIDEO_H264_FMO_RUN_LENGTH: return "H264 FMO No. of Consecutive MBs";
725 case V4L2_CID_MPEG_VIDEO_H264_ASO: return "H264 Arbitrary Slice Ordering";
726 case V4L2_CID_MPEG_VIDEO_H264_ASO_SLICE_ORDER: return "H264 ASO Slice Order";
727 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING: return "Enable H264 Hierarchical Coding";
728 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_TYPE: return "H264 Hierarchical Coding Type";
729 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER:return "H264 Number of HC Layers";
730 case V4L2_CID_MPEG_VIDEO_H264_HIERARCHICAL_CODING_LAYER_QP:
731 return "H264 Set QP Value for HC Layers";
064f5096 732 case V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP: return "MPEG4 I-Frame QP Value";
f08aacf8
HV		 733 case V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP: return "MPEG4 P-Frame QP Value";
734 case V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP: return "MPEG4 B-Frame QP Value";
064f5096
KD		 735 case V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP: return "MPEG4 Minimum QP Value";
736 case V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP: return "MPEG4 Maximum QP Value";
737 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL: return "MPEG4 Level";
738 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE: return "MPEG4 Profile";
739 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL: return "Quarter Pixel Search Enable";
f08aacf8
HV		 740 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_BYTES: return "Maximum Bytes in a Slice";
741 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MAX_MB: return "Number of MBs in a Slice";
742 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE: return "Slice Partitioning Method";
064f5096 743 case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
24c19a21
HV		 744 case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
745 case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
2e81dde9 746 case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
bf0bedd3
AG		 747 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
748 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
9ca5470c 749 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
0996517c 750
bc9028e1
AK		 751 /* VPX controls */
752 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
753 case V4L2_CID_MPEG_VIDEO_VPX_IMD_DISABLE_4X4: return "VPX Intra Mode Decision Disable";
754 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES: return "VPX No. of Refs for P Frame";
755 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_LEVEL: return "VPX Loop Filter Level Range";
756 case V4L2_CID_MPEG_VIDEO_VPX_FILTER_SHARPNESS: return "VPX Deblocking Effect Control";
757 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_REF_PERIOD: return "VPX Golden Frame Refresh Period";
758 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL: return "VPX Golden Frame Indicator";
4773ab99
AK		 759 case V4L2_CID_MPEG_VIDEO_VPX_MIN_QP: return "VPX Minimum QP Value";
760 case V4L2_CID_MPEG_VIDEO_VPX_MAX_QP: return "VPX Maximum QP Value";
761 case V4L2_CID_MPEG_VIDEO_VPX_I_FRAME_QP: return "VPX I-Frame QP Value";
762 case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
bbd8f3fe 763 case V4L2_CID_MPEG_VIDEO_VPX_PROFILE: return "VPX Profile";
bc9028e1 764
0996517c 765 /* CAMERA controls */
59253f29 766 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 767 case V4L2_CID_CAMERA_CLASS: return "Camera Controls";
768 case V4L2_CID_EXPOSURE_AUTO: return "Auto Exposure";
769 case V4L2_CID_EXPOSURE_ABSOLUTE: return "Exposure Time, Absolute";
770 case V4L2_CID_EXPOSURE_AUTO_PRIORITY: return "Exposure, Dynamic Framerate";
771 case V4L2_CID_PAN_RELATIVE: return "Pan, Relative";
772 case V4L2_CID_TILT_RELATIVE: return "Tilt, Relative";
773 case V4L2_CID_PAN_RESET: return "Pan, Reset";
774 case V4L2_CID_TILT_RESET: return "Tilt, Reset";
775 case V4L2_CID_PAN_ABSOLUTE: return "Pan, Absolute";
776 case V4L2_CID_TILT_ABSOLUTE: return "Tilt, Absolute";
777 case V4L2_CID_FOCUS_ABSOLUTE: return "Focus, Absolute";
778 case V4L2_CID_FOCUS_RELATIVE: return "Focus, Relative";
2272ab65 779 case V4L2_CID_FOCUS_AUTO: return "Focus, Automatic Continuous";
0996517c
HV		 780 case V4L2_CID_ZOOM_ABSOLUTE: return "Zoom, Absolute";
781 case V4L2_CID_ZOOM_RELATIVE: return "Zoom, Relative";
782 case V4L2_CID_ZOOM_CONTINUOUS: return "Zoom, Continuous";
783 case V4L2_CID_PRIVACY: return "Privacy";
6c8d6111
HV		 784 case V4L2_CID_IRIS_ABSOLUTE: return "Iris, Absolute";
785 case V4L2_CID_IRIS_RELATIVE: return "Iris, Relative";
d58083c9 786 case V4L2_CID_AUTO_EXPOSURE_BIAS: return "Auto Exposure, Bias";
e40a0573 787 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE: return "White Balance, Auto & Preset";
44d44a1a 788 case V4L2_CID_WIDE_DYNAMIC_RANGE: return "Wide Dynamic Range";
82b3056c 789 case V4L2_CID_IMAGE_STABILIZATION: return "Image Stabilization";
7f84ad8b
SN		 790 case V4L2_CID_ISO_SENSITIVITY: return "ISO Sensitivity";
791 case V4L2_CID_ISO_SENSITIVITY_AUTO: return "ISO Sensitivity, Auto";
cf072139 792 case V4L2_CID_EXPOSURE_METERING: return "Exposure, Metering Mode";
0bf6b7dc 793 case V4L2_CID_SCENE_MODE: return "Scene Mode";
fc162a09 794 case V4L2_CID_3A_LOCK: return "3A Lock";
2272ab65
SN		 795 case V4L2_CID_AUTO_FOCUS_START: return "Auto Focus, Start";
796 case V4L2_CID_AUTO_FOCUS_STOP: return "Auto Focus, Stop";
797 case V4L2_CID_AUTO_FOCUS_STATUS: return "Auto Focus, Status";
798 case V4L2_CID_AUTO_FOCUS_RANGE: return "Auto Focus, Range";
e3d6eb1c
VP		 799 case V4L2_CID_PAN_SPEED: return "Pan, Speed";
800 case V4L2_CID_TILT_SPEED: return "Tilt, Speed";
0996517c 801
59253f29
HV		 802 /* FM Radio Modulator controls */
803 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
0996517c
HV		 804 case V4L2_CID_FM_TX_CLASS: return "FM Radio Modulator Controls";
805 case V4L2_CID_RDS_TX_DEVIATION: return "RDS Signal Deviation";
806 case V4L2_CID_RDS_TX_PI: return "RDS Program ID";
807 case V4L2_CID_RDS_TX_PTY: return "RDS Program Type";
808 case V4L2_CID_RDS_TX_PS_NAME: return "RDS PS Name";
809 case V4L2_CID_RDS_TX_RADIO_TEXT: return "RDS Radio Text";
811c5081
HV		 810 case V4L2_CID_RDS_TX_MONO_STEREO: return "RDS Stereo";
811 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD: return "RDS Artificial Head";
812 case V4L2_CID_RDS_TX_COMPRESSED: return "RDS Compressed";
813 case V4L2_CID_RDS_TX_DYNAMIC_PTY: return "RDS Dynamic PTY";
814 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
815 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
816 case V4L2_CID_RDS_TX_MUSIC_SPEECH: return "RDS Music";
817 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE: return "RDS Enable Alt Frequencies";
818 case V4L2_CID_RDS_TX_ALT_FREQS: return "RDS Alternate Frequencies";
0996517c
HV		 819 case V4L2_CID_AUDIO_LIMITER_ENABLED: return "Audio Limiter Feature Enabled";
820 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME: return "Audio Limiter Release Time";
821 case V4L2_CID_AUDIO_LIMITER_DEVIATION: return "Audio Limiter Deviation";
f08aacf8 822 case V4L2_CID_AUDIO_COMPRESSION_ENABLED: return "Audio Compression Enabled";
0996517c
HV		 823 case V4L2_CID_AUDIO_COMPRESSION_GAIN: return "Audio Compression Gain";
824 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD: return "Audio Compression Threshold";
825 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME: return "Audio Compression Attack Time";
826 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME: return "Audio Compression Release Time";
827 case V4L2_CID_PILOT_TONE_ENABLED: return "Pilot Tone Feature Enabled";
828 case V4L2_CID_PILOT_TONE_DEVIATION: return "Pilot Tone Deviation";
829 case V4L2_CID_PILOT_TONE_FREQUENCY: return "Pilot Tone Frequency";
f08aacf8 830 case V4L2_CID_TUNE_PREEMPHASIS: return "Pre-Emphasis";
0996517c
HV		 831 case V4L2_CID_TUNE_POWER_LEVEL: return "Tune Power Level";
832 case V4L2_CID_TUNE_ANTENNA_CAPACITOR: return "Tune Antenna Capacitor";
833
0b159acd 834 /* Flash controls */
59253f29 835 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
f08aacf8
HV		 836 case V4L2_CID_FLASH_CLASS: return "Flash Controls";
837 case V4L2_CID_FLASH_LED_MODE: return "LED Mode";
838 case V4L2_CID_FLASH_STROBE_SOURCE: return "Strobe Source";
0b159acd 839 case V4L2_CID_FLASH_STROBE: return "Strobe";
f08aacf8
HV		 840 case V4L2_CID_FLASH_STROBE_STOP: return "Stop Strobe";
841 case V4L2_CID_FLASH_STROBE_STATUS: return "Strobe Status";
842 case V4L2_CID_FLASH_TIMEOUT: return "Strobe Timeout";
843 case V4L2_CID_FLASH_INTENSITY: return "Intensity, Flash Mode";
844 case V4L2_CID_FLASH_TORCH_INTENSITY: return "Intensity, Torch Mode";
845 case V4L2_CID_FLASH_INDICATOR_INTENSITY: return "Intensity, Indicator";
0b159acd
SA		 846 case V4L2_CID_FLASH_FAULT: return "Faults";
847 case V4L2_CID_FLASH_CHARGE: return "Charge";
f08aacf8 848 case V4L2_CID_FLASH_READY: return "Ready to Strobe";
0b159acd 849
c7361ae1 850 /* JPEG encoder controls */
59253f29 851 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c7361ae1
SN		 852 case V4L2_CID_JPEG_CLASS: return "JPEG Compression Controls";
853 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: return "Chroma Subsampling";
854 case V4L2_CID_JPEG_RESTART_INTERVAL: return "Restart Interval";
855 case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
856 case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
857
8c9d236e 858 /* Image source controls */
59253f29 859 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
8c9d236e
SA		 860 case V4L2_CID_IMAGE_SOURCE_CLASS: return "Image Source Controls";
861 case V4L2_CID_VBLANK: return "Vertical Blanking";
862 case V4L2_CID_HBLANK: return "Horizontal Blanking";
863 case V4L2_CID_ANALOGUE_GAIN: return "Analogue Gain";
0fc87864
SA		 864 case V4L2_CID_TEST_PATTERN_RED: return "Red Pixel Value";
865 case V4L2_CID_TEST_PATTERN_GREENR: return "Green (Red) Pixel Value";
866 case V4L2_CID_TEST_PATTERN_BLUE: return "Blue Pixel Value";
867 case V4L2_CID_TEST_PATTERN_GREENB: return "Green (Blue) Pixel Value";
8c9d236e 868
c643ee13 869 /* Image processing controls */
59253f29 870 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
c643ee13
SA		 871 case V4L2_CID_IMAGE_PROC_CLASS: return "Image Processing Controls";
872 case V4L2_CID_LINK_FREQ: return "Link Frequency";
873 case V4L2_CID_PIXEL_RATE: return "Pixel Rate";
5ebef0fb 874 case V4L2_CID_TEST_PATTERN: return "Test Pattern";
c643ee13 875
977ebec7 876 /* DV controls */
59253f29 877 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
977ebec7
HV		 878 case V4L2_CID_DV_CLASS: return "Digital Video Controls";
879 case V4L2_CID_DV_TX_HOTPLUG: return "Hotplug Present";
880 case V4L2_CID_DV_TX_RXSENSE: return "RxSense Present";
881 case V4L2_CID_DV_TX_EDID_PRESENT: return "EDID Present";
882 case V4L2_CID_DV_TX_MODE: return "Transmit Mode";
883 case V4L2_CID_DV_TX_RGB_RANGE: return "Tx RGB Quantization Range";
884 case V4L2_CID_DV_RX_POWER_PRESENT: return "Power Present";
885 case V4L2_CID_DV_RX_RGB_RANGE: return "Rx RGB Quantization Range";
886
aec330a8
AS		 887 case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
888 case V4L2_CID_TUNE_DEEMPHASIS: return "De-Emphasis";
889 case V4L2_CID_RDS_RECEPTION: return "RDS Reception";
80807fad 890 case V4L2_CID_RF_TUNER_CLASS: return "RF Tuner Controls";
41018cb8 891 case V4L2_CID_RF_TUNER_RF_GAIN: return "RF Gain";
80807fad
AP		 892 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO: return "LNA Gain, Auto";
893 case V4L2_CID_RF_TUNER_LNA_GAIN: return "LNA Gain";
894 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO: return "Mixer Gain, Auto";
895 case V4L2_CID_RF_TUNER_MIXER_GAIN: return "Mixer Gain";
896 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO: return "IF Gain, Auto";
897 case V4L2_CID_RF_TUNER_IF_GAIN: return "IF Gain";
3ce569fd
AP		 898 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO: return "Bandwidth, Auto";
899 case V4L2_CID_RF_TUNER_BANDWIDTH: return "Bandwidth";
9aa4357e 900 case V4L2_CID_RF_TUNER_PLL_LOCK: return "PLL Lock";
9570a148
HV		 901 case V4L2_CID_RDS_RX_PTY: return "RDS Program Type";
902 case V4L2_CID_RDS_RX_PS_NAME: return "RDS PS Name";
903 case V4L2_CID_RDS_RX_RADIO_TEXT: return "RDS Radio Text";
904 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT: return "RDS Traffic Announcement";
905 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM: return "RDS Traffic Program";
906 case V4L2_CID_RDS_RX_MUSIC_SPEECH: return "RDS Music";
a77b4fc0
HV		 907
908 /* Detection controls */
909 /* Keep the order of the 'case's the same as in v4l2-controls.h! */
910 case V4L2_CID_DETECT_CLASS: return "Detection Controls";
911 case V4L2_CID_DETECT_MD_MODE: return "Motion Detection Mode";
912 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD: return "MD Global Threshold";
913 case V4L2_CID_DETECT_MD_THRESHOLD_GRID: return "MD Threshold Grid";
914 case V4L2_CID_DETECT_MD_REGION_GRID: return "MD Region Grid";
0996517c
HV		 915 default:
916 return NULL;
917 }
918}
919EXPORT_SYMBOL(v4l2_ctrl_get_name);
920
921void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
0ba2aeb6 922 s64 *min, s64 *max, u64 *step, s64 *def, u32 *flags)
0996517c
HV		 923{
924 *name = v4l2_ctrl_get_name(id);
925 *flags = 0;
926
927 switch (id) {
928 case V4L2_CID_AUDIO_MUTE:
929 case V4L2_CID_AUDIO_LOUDNESS:
930 case V4L2_CID_AUTO_WHITE_BALANCE:
931 case V4L2_CID_AUTOGAIN:
932 case V4L2_CID_HFLIP:
933 case V4L2_CID_VFLIP:
934 case V4L2_CID_HUE_AUTO:
935 case V4L2_CID_CHROMA_AGC:
936 case V4L2_CID_COLOR_KILLER:
a2f8b84f 937 case V4L2_CID_AUTOBRIGHTNESS:
0996517c
HV		 938 case V4L2_CID_MPEG_AUDIO_MUTE:
939 case V4L2_CID_MPEG_VIDEO_MUTE:
940 case V4L2_CID_MPEG_VIDEO_GOP_CLOSURE:
941 case V4L2_CID_MPEG_VIDEO_PULLDOWN:
942 case V4L2_CID_EXPOSURE_AUTO_PRIORITY:
943 case V4L2_CID_FOCUS_AUTO:
944 case V4L2_CID_PRIVACY:
945 case V4L2_CID_AUDIO_LIMITER_ENABLED:
946 case V4L2_CID_AUDIO_COMPRESSION_ENABLED:
947 case V4L2_CID_PILOT_TONE_ENABLED:
008d35f2
JFM		 948 case V4L2_CID_ILLUMINATORS_1:
949 case V4L2_CID_ILLUMINATORS_2:
0b159acd
SA		 950 case V4L2_CID_FLASH_STROBE_STATUS:
951 case V4L2_CID_FLASH_CHARGE:
952 case V4L2_CID_FLASH_READY:
064f5096
KD		 953 case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
954 case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
955 case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
956 case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
957 case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
958 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
959 case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
9ca5470c 960 case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
44d44a1a 961 case V4L2_CID_WIDE_DYNAMIC_RANGE:
82b3056c 962 case V4L2_CID_IMAGE_STABILIZATION:
aec330a8 963 case V4L2_CID_RDS_RECEPTION:
80807fad
AP		 964 case V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
965 case V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
966 case V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
3ce569fd 967 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
9aa4357e 968 case V4L2_CID_RF_TUNER_PLL_LOCK:
811c5081
HV		 969 case V4L2_CID_RDS_TX_MONO_STEREO:
970 case V4L2_CID_RDS_TX_ARTIFICIAL_HEAD:
971 case V4L2_CID_RDS_TX_COMPRESSED:
972 case V4L2_CID_RDS_TX_DYNAMIC_PTY:
973 case V4L2_CID_RDS_TX_TRAFFIC_ANNOUNCEMENT:
974 case V4L2_CID_RDS_TX_TRAFFIC_PROGRAM:
975 case V4L2_CID_RDS_TX_MUSIC_SPEECH:
976 case V4L2_CID_RDS_TX_ALT_FREQS_ENABLE:
9570a148
HV		 977 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
978 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
979 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0996517c
HV		 980 *type = V4L2_CTRL_TYPE_BOOLEAN;
981 *min = 0;
982 *max = *step = 1;
983 break;
bf0bedd3
AG		 984 case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
985 case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
986 *type = V4L2_CTRL_TYPE_INTEGER;
987 break;
0996517c
HV		 988 case V4L2_CID_PAN_RESET:
989 case V4L2_CID_TILT_RESET:
0b159acd
SA		 990 case V4L2_CID_FLASH_STROBE:
991 case V4L2_CID_FLASH_STROBE_STOP:
2272ab65
SN		 992 case V4L2_CID_AUTO_FOCUS_START:
993 case V4L2_CID_AUTO_FOCUS_STOP:
0996517c 994 *type = V4L2_CTRL_TYPE_BUTTON;
ef66c0ca
RR		 995 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
996 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 997 *min = *max = *step = *def = 0;
998 break;
999 case V4L2_CID_POWER_LINE_FREQUENCY:
1000 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
1001 case V4L2_CID_MPEG_AUDIO_ENCODING:
1002 case V4L2_CID_MPEG_AUDIO_L1_BITRATE:
1003 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
1004 case V4L2_CID_MPEG_AUDIO_L3_BITRATE:
1005 case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
1006 case V4L2_CID_MPEG_AUDIO_MODE:
1007 case V4L2_CID_MPEG_AUDIO_MODE_EXTENSION:
1008 case V4L2_CID_MPEG_AUDIO_EMPHASIS:
1009 case V4L2_CID_MPEG_AUDIO_CRC:
24c19a21
HV		 1010 case V4L2_CID_MPEG_AUDIO_DEC_PLAYBACK:
1011 case V4L2_CID_MPEG_AUDIO_DEC_MULTILINGUAL_PLAYBACK:
0996517c
HV		 1012 case V4L2_CID_MPEG_VIDEO_ENCODING:
1013 case V4L2_CID_MPEG_VIDEO_ASPECT:
1014 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1015 case V4L2_CID_MPEG_STREAM_TYPE:
1016 case V4L2_CID_MPEG_STREAM_VBI_FMT:
1017 case V4L2_CID_EXPOSURE_AUTO:
2272ab65 1018 case V4L2_CID_AUTO_FOCUS_RANGE:
0996517c 1019 case V4L2_CID_COLORFX:
e40a0573 1020 case V4L2_CID_AUTO_N_PRESET_WHITE_BALANCE:
0996517c 1021 case V4L2_CID_TUNE_PREEMPHASIS:
0b159acd
SA		 1022 case V4L2_CID_FLASH_LED_MODE:
1023 case V4L2_CID_FLASH_STROBE_SOURCE:
064f5096
KD		 1024 case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
1025 case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
1026 case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
1027 case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
1028 case V4L2_CID_MPEG_VIDEO_H264_LOOP_FILTER_MODE:
1029 case V4L2_CID_MPEG_VIDEO_H264_PROFILE:
1030 case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_IDC:
2e81dde9
AK		 1031 case V4L2_CID_MPEG_VIDEO_H264_SEI_FP_ARRANGEMENT_TYPE:
1032 case V4L2_CID_MPEG_VIDEO_H264_FMO_MAP_TYPE:
064f5096
KD		 1033 case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
1034 case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
c7361ae1 1035 case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
7f84ad8b 1036 case V4L2_CID_ISO_SENSITIVITY_AUTO:
cf072139 1037 case V4L2_CID_EXPOSURE_METERING:
0bf6b7dc 1038 case V4L2_CID_SCENE_MODE:
977ebec7
HV		 1039 case V4L2_CID_DV_TX_MODE:
1040 case V4L2_CID_DV_TX_RGB_RANGE:
1041 case V4L2_CID_DV_RX_RGB_RANGE:
5ebef0fb 1042 case V4L2_CID_TEST_PATTERN:
aec330a8 1043 case V4L2_CID_TUNE_DEEMPHASIS:
bc9028e1 1044 case V4L2_CID_MPEG_VIDEO_VPX_GOLDEN_FRAME_SEL:
a77b4fc0 1045 case V4L2_CID_DETECT_MD_MODE:
0996517c
HV		 1046 *type = V4L2_CTRL_TYPE_MENU;
1047 break;
c643ee13
SA		 1048 case V4L2_CID_LINK_FREQ:
1049 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1050 break;
0996517c
HV		 1051 case V4L2_CID_RDS_TX_PS_NAME:
1052 case V4L2_CID_RDS_TX_RADIO_TEXT:
9570a148
HV		 1053 case V4L2_CID_RDS_RX_PS_NAME:
1054 case V4L2_CID_RDS_RX_RADIO_TEXT:
0996517c
HV		 1055 *type = V4L2_CTRL_TYPE_STRING;
1056 break;
7f84ad8b 1057 case V4L2_CID_ISO_SENSITIVITY:
d58083c9 1058 case V4L2_CID_AUTO_EXPOSURE_BIAS:
bc9028e1
AK		 1059 case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:
1060 case V4L2_CID_MPEG_VIDEO_VPX_NUM_REF_FRAMES:
d58083c9
SN		 1061 *type = V4L2_CTRL_TYPE_INTEGER_MENU;
1062 break;
0996517c
HV		 1063 case V4L2_CID_USER_CLASS:
1064 case V4L2_CID_CAMERA_CLASS:
1065 case V4L2_CID_MPEG_CLASS:
1066 case V4L2_CID_FM_TX_CLASS:
0b159acd 1067 case V4L2_CID_FLASH_CLASS:
c7361ae1 1068 case V4L2_CID_JPEG_CLASS:
8c9d236e 1069 case V4L2_CID_IMAGE_SOURCE_CLASS:
c643ee13 1070 case V4L2_CID_IMAGE_PROC_CLASS:
977ebec7 1071 case V4L2_CID_DV_CLASS:
aec330a8 1072 case V4L2_CID_FM_RX_CLASS:
80807fad 1073 case V4L2_CID_RF_TUNER_CLASS:
a77b4fc0 1074 case V4L2_CID_DETECT_CLASS:
0996517c
HV		 1075 *type = V4L2_CTRL_TYPE_CTRL_CLASS;
1076 /* You can neither read not write these */
1077 *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
1078 *min = *max = *step = *def = 0;
1079 break;
1080 case V4L2_CID_BG_COLOR:
1081 *type = V4L2_CTRL_TYPE_INTEGER;
1082 *step = 1;
1083 *min = 0;
1084 /* Max is calculated as RGB888 that is 2^24 */
1085 *max = 0xFFFFFF;
1086 break;
0b159acd 1087 case V4L2_CID_FLASH_FAULT:
c7361ae1 1088 case V4L2_CID_JPEG_ACTIVE_MARKER:
fc162a09 1089 case V4L2_CID_3A_LOCK:
2272ab65 1090 case V4L2_CID_AUTO_FOCUS_STATUS:
977ebec7
HV		 1091 case V4L2_CID_DV_TX_HOTPLUG:
1092 case V4L2_CID_DV_TX_RXSENSE:
1093 case V4L2_CID_DV_TX_EDID_PRESENT:
1094 case V4L2_CID_DV_RX_POWER_PRESENT:
0b159acd
SA		 1095 *type = V4L2_CTRL_TYPE_BITMASK;
1096 break;
064f5096
KD		 1097 case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
1098 case V4L2_CID_MIN_BUFFERS_FOR_OUTPUT:
1099 *type = V4L2_CTRL_TYPE_INTEGER;
1100 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1101 break;
24c19a21 1102 case V4L2_CID_MPEG_VIDEO_DEC_PTS:
0ba2aeb6
HV		 1103 *type = V4L2_CTRL_TYPE_INTEGER64;
1104 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1105 *min = *def = 0;
1106 *max = 0x1ffffffffLL;
1107 *step = 1;
1108 break;
1109 case V4L2_CID_MPEG_VIDEO_DEC_FRAME:
1110 *type = V4L2_CTRL_TYPE_INTEGER64;
1111 *flags |= V4L2_CTRL_FLAG_VOLATILE | V4L2_CTRL_FLAG_READ_ONLY;
1112 *min = *def = 0;
1113 *max = 0x7fffffffffffffffLL;
1114 *step = 1;
1115 break;
c643ee13 1116 case V4L2_CID_PIXEL_RATE:
24c19a21 1117 *type = V4L2_CTRL_TYPE_INTEGER64;
c643ee13 1118 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
24c19a21 1119 break;
a77b4fc0
HV		 1120 case V4L2_CID_DETECT_MD_REGION_GRID:
1121 *type = V4L2_CTRL_TYPE_U8;
1122 break;
1123 case V4L2_CID_DETECT_MD_THRESHOLD_GRID:
1124 *type = V4L2_CTRL_TYPE_U16;
1125 break;
811c5081
HV		 1126 case V4L2_CID_RDS_TX_ALT_FREQS:
1127 *type = V4L2_CTRL_TYPE_U32;
1128 break;
0996517c
HV		 1129 default:
1130 *type = V4L2_CTRL_TYPE_INTEGER;
1131 break;
1132 }
1133 switch (id) {
1134 case V4L2_CID_MPEG_AUDIO_ENCODING:
1135 case V4L2_CID_MPEG_AUDIO_MODE:
1136 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
1137 case V4L2_CID_MPEG_VIDEO_B_FRAMES:
1138 case V4L2_CID_MPEG_STREAM_TYPE:
1139 *flags |= V4L2_CTRL_FLAG_UPDATE;
1140 break;
1141 case V4L2_CID_AUDIO_VOLUME:
1142 case V4L2_CID_AUDIO_BALANCE:
1143 case V4L2_CID_AUDIO_BASS:
1144 case V4L2_CID_AUDIO_TREBLE:
1145 case V4L2_CID_BRIGHTNESS:
1146 case V4L2_CID_CONTRAST:
1147 case V4L2_CID_SATURATION:
1148 case V4L2_CID_HUE:
1149 case V4L2_CID_RED_BALANCE:
1150 case V4L2_CID_BLUE_BALANCE:
1151 case V4L2_CID_GAMMA:
1152 case V4L2_CID_SHARPNESS:
1153 case V4L2_CID_CHROMA_GAIN:
1154 case V4L2_CID_RDS_TX_DEVIATION:
1155 case V4L2_CID_AUDIO_LIMITER_RELEASE_TIME:
1156 case V4L2_CID_AUDIO_LIMITER_DEVIATION:
1157 case V4L2_CID_AUDIO_COMPRESSION_GAIN:
1158 case V4L2_CID_AUDIO_COMPRESSION_THRESHOLD:
1159 case V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME:
1160 case V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME:
1161 case V4L2_CID_PILOT_TONE_DEVIATION:
1162 case V4L2_CID_PILOT_TONE_FREQUENCY:
1163 case V4L2_CID_TUNE_POWER_LEVEL:
1164 case V4L2_CID_TUNE_ANTENNA_CAPACITOR:
41018cb8 1165 case V4L2_CID_RF_TUNER_RF_GAIN:
80807fad
AP		 1166 case V4L2_CID_RF_TUNER_LNA_GAIN:
1167 case V4L2_CID_RF_TUNER_MIXER_GAIN:
1168 case V4L2_CID_RF_TUNER_IF_GAIN:
3ce569fd 1169 case V4L2_CID_RF_TUNER_BANDWIDTH:
a77b4fc0 1170 case V4L2_CID_DETECT_MD_GLOBAL_THRESHOLD:
0996517c
HV		 1171 *flags |= V4L2_CTRL_FLAG_SLIDER;
1172 break;
1173 case V4L2_CID_PAN_RELATIVE:
1174 case V4L2_CID_TILT_RELATIVE:
1175 case V4L2_CID_FOCUS_RELATIVE:
1176 case V4L2_CID_IRIS_RELATIVE:
1177 case V4L2_CID_ZOOM_RELATIVE:
ef66c0ca
RR		 1178 *flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1179 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c 1180 break;
0b159acd 1181 case V4L2_CID_FLASH_STROBE_STATUS:
2272ab65 1182 case V4L2_CID_AUTO_FOCUS_STATUS:
0b159acd 1183 case V4L2_CID_FLASH_READY:
977ebec7
HV		 1184 case V4L2_CID_DV_TX_HOTPLUG:
1185 case V4L2_CID_DV_TX_RXSENSE:
1186 case V4L2_CID_DV_TX_EDID_PRESENT:
1187 case V4L2_CID_DV_RX_POWER_PRESENT:
9570a148
HV		 1188 case V4L2_CID_RDS_RX_PTY:
1189 case V4L2_CID_RDS_RX_PS_NAME:
1190 case V4L2_CID_RDS_RX_RADIO_TEXT:
1191 case V4L2_CID_RDS_RX_TRAFFIC_ANNOUNCEMENT:
1192 case V4L2_CID_RDS_RX_TRAFFIC_PROGRAM:
1193 case V4L2_CID_RDS_RX_MUSIC_SPEECH:
0b159acd
SA		 1194 *flags |= V4L2_CTRL_FLAG_READ_ONLY;
1195 break;
9aa4357e
AP		 1196 case V4L2_CID_RF_TUNER_PLL_LOCK:
1197 *flags |= V4L2_CTRL_FLAG_VOLATILE;
1198 break;
0996517c
HV		 1199 }
1200}
1201EXPORT_SYMBOL(v4l2_ctrl_fill);
1202
6e239399
HV		 1203static void fill_event(struct v4l2_event *ev, struct v4l2_ctrl *ctrl, u32 changes)
1204{
1205 memset(ev->reserved, 0, sizeof(ev->reserved));
1206 ev->type = V4L2_EVENT_CTRL;
1207 ev->id = ctrl->id;
1208 ev->u.ctrl.changes = changes;
1209 ev->u.ctrl.type = ctrl->type;
1210 ev->u.ctrl.flags = ctrl->flags;
d9a25471 1211 if (ctrl->is_ptr)
6e239399
HV		 1212 ev->u.ctrl.value64 = 0;
1213 else
2a9ec373 1214 ev->u.ctrl.value64 = *ctrl->p_cur.p_s64;
6e239399
HV		 1215 ev->u.ctrl.minimum = ctrl->minimum;
1216 ev->u.ctrl.maximum = ctrl->maximum;
ce580fe5
SA		 1217 if (ctrl->type == V4L2_CTRL_TYPE_MENU
1218 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
6e239399
HV		 1219 ev->u.ctrl.step = 1;
1220 else
1221 ev->u.ctrl.step = ctrl->step;
1222 ev->u.ctrl.default_value = ctrl->default_value;
1223}
1224
1225static void send_event(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 changes)
1226{
1227 struct v4l2_event ev;
77068d36 1228 struct v4l2_subscribed_event *sev;
6e239399 1229
77068d36 1230 if (list_empty(&ctrl->ev_subs))
3f66f0ed 1231 return;
6e239399
HV		 1232 fill_event(&ev, ctrl, changes);
1233
77068d36 1234 list_for_each_entry(sev, &ctrl->ev_subs, node)
e3e72f39
HG		 1235 if (sev->fh != fh ||
1236 (sev->flags & V4L2_EVENT_SUB_FL_ALLOW_FEEDBACK))
77068d36 1237 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 1238}
1239
998e7659 1240static bool std_equal(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1241 union v4l2_ctrl_ptr ptr1,
1242 union v4l2_ctrl_ptr ptr2)
1243{
1244 switch (ctrl->type) {
1245 case V4L2_CTRL_TYPE_BUTTON:
1246 return false;
1247 case V4L2_CTRL_TYPE_STRING:
265c7f8a 1248 idx *= ctrl->elem_size;
0176077a 1249 /* strings are always 0-terminated */
265c7f8a 1250 return !strcmp(ptr1.p_char + idx, ptr2.p_char + idx);
0176077a 1251 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1252 return ptr1.p_s64[idx] == ptr2.p_s64[idx];
dda4a4d5
HV		 1253 case V4L2_CTRL_TYPE_U8:
1254 return ptr1.p_u8[idx] == ptr2.p_u8[idx];
1255 case V4L2_CTRL_TYPE_U16:
1256 return ptr1.p_u16[idx] == ptr2.p_u16[idx];
811c5081
HV		 1257 case V4L2_CTRL_TYPE_U32:
1258 return ptr1.p_u32[idx] == ptr2.p_u32[idx];
0176077a 1259 default:
265c7f8a
HV		 1260 if (ctrl->is_int)
1261 return ptr1.p_s32[idx] == ptr2.p_s32[idx];
1262 idx *= ctrl->elem_size;
1263 return !memcmp(ptr1.p + idx, ptr2.p + idx, ctrl->elem_size);
0176077a
HV		 1264 }
1265}
1266
998e7659 1267static void std_init(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1268 union v4l2_ctrl_ptr ptr)
1269{
1270 switch (ctrl->type) {
1271 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1272 idx *= ctrl->elem_size;
1273 memset(ptr.p_char + idx, ' ', ctrl->minimum);
1274 ptr.p_char[idx + ctrl->minimum] = '\0';
0176077a
HV		 1275 break;
1276 case V4L2_CTRL_TYPE_INTEGER64:
265c7f8a 1277 ptr.p_s64[idx] = ctrl->default_value;
0176077a
HV		 1278 break;
1279 case V4L2_CTRL_TYPE_INTEGER:
1280 case V4L2_CTRL_TYPE_INTEGER_MENU:
1281 case V4L2_CTRL_TYPE_MENU:
1282 case V4L2_CTRL_TYPE_BITMASK:
1283 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1284 ptr.p_s32[idx] = ctrl->default_value;
0176077a 1285 break;
dda4a4d5
HV		 1286 case V4L2_CTRL_TYPE_U8:
1287 ptr.p_u8[idx] = ctrl->default_value;
1288 break;
1289 case V4L2_CTRL_TYPE_U16:
1290 ptr.p_u16[idx] = ctrl->default_value;
1291 break;
811c5081
HV		 1292 case V4L2_CTRL_TYPE_U32:
1293 ptr.p_u32[idx] = ctrl->default_value;
1294 break;
0176077a 1295 default:
302ab7ce
HV		 1296 idx *= ctrl->elem_size;
1297 memset(ptr.p + idx, 0, ctrl->elem_size);
0176077a
HV		 1298 break;
1299 }
1300}
1301
1302static void std_log(const struct v4l2_ctrl *ctrl)
1303{
1304 union v4l2_ctrl_ptr ptr = ctrl->p_cur;
1305
998e7659
HV		 1306 if (ctrl->is_array) {
1307 unsigned i;
1308
1309 for (i = 0; i < ctrl->nr_of_dims; i++)
1310 pr_cont("[%u]", ctrl->dims[i]);
1311 pr_cont(" ");
1312 }
1313
0176077a
HV		 1314 switch (ctrl->type) {
1315 case V4L2_CTRL_TYPE_INTEGER:
1316 pr_cont("%d", *ptr.p_s32);
1317 break;
1318 case V4L2_CTRL_TYPE_BOOLEAN:
1319 pr_cont("%s", *ptr.p_s32 ? "true" : "false");
1320 break;
1321 case V4L2_CTRL_TYPE_MENU:
1322 pr_cont("%s", ctrl->qmenu[*ptr.p_s32]);
1323 break;
1324 case V4L2_CTRL_TYPE_INTEGER_MENU:
1325 pr_cont("%lld", ctrl->qmenu_int[*ptr.p_s32]);
1326 break;
1327 case V4L2_CTRL_TYPE_BITMASK:
1328 pr_cont("0x%08x", *ptr.p_s32);
1329 break;
1330 case V4L2_CTRL_TYPE_INTEGER64:
1331 pr_cont("%lld", *ptr.p_s64);
1332 break;
1333 case V4L2_CTRL_TYPE_STRING:
1334 pr_cont("%s", ptr.p_char);
1335 break;
dda4a4d5
HV		 1336 case V4L2_CTRL_TYPE_U8:
1337 pr_cont("%u", (unsigned)*ptr.p_u8);
1338 break;
1339 case V4L2_CTRL_TYPE_U16:
1340 pr_cont("%u", (unsigned)*ptr.p_u16);
1341 break;
811c5081
HV		 1342 case V4L2_CTRL_TYPE_U32:
1343 pr_cont("%u", (unsigned)*ptr.p_u32);
1344 break;
0176077a
HV		 1345 default:
1346 pr_cont("unknown type %d", ctrl->type);
1347 break;
1348 }
1349}
1350
958c7c7e
HV		 1351/*
1352 * Round towards the closest legal value. Be careful when we are
1353 * close to the maximum range of the control type to prevent
1354 * wrap-arounds.
1355 */
0176077a
HV		 1356#define ROUND_TO_RANGE(val, offset_type, ctrl) \
1357({ \
1358 offset_type offset; \
958c7c7e 1359 if ((ctrl)->maximum >= 0 && \
9c9cb1fa 1360 val >= (ctrl)->maximum - (s32)((ctrl)->step / 2)) \
958c7c7e
HV		 1361 val = (ctrl)->maximum; \
1362 else \
9c9cb1fa 1363 val += (s32)((ctrl)->step / 2); \
0176077a
HV		 1364 val = clamp_t(typeof(val), val, \
1365 (ctrl)->minimum, (ctrl)->maximum); \
1366 offset = (val) - (ctrl)->minimum; \
9c9cb1fa 1367 offset = (ctrl)->step * (offset / (u32)(ctrl)->step); \
0176077a
HV		 1368 val = (ctrl)->minimum + offset; \
1369 0; \
1370})
1371
1372/* Validate a new control */
998e7659 1373static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
0176077a
HV		 1374 union v4l2_ctrl_ptr ptr)
1375{
1376 size_t len;
0d5e8c43
HV		 1377 u64 offset;
1378 s64 val;
0176077a
HV		 1379
1380 switch (ctrl->type) {
1381 case V4L2_CTRL_TYPE_INTEGER:
265c7f8a 1382 return ROUND_TO_RANGE(ptr.p_s32[idx], u32, ctrl);
0176077a 1383 case V4L2_CTRL_TYPE_INTEGER64:
0d5e8c43
HV		 1384 /*
1385 * We can't use the ROUND_TO_RANGE define here due to
1386 * the u64 divide that needs special care.
1387 */
1388 val = ptr.p_s64[idx];
9c9cb1fa 1389 if (ctrl->maximum >= 0 && val >= ctrl->maximum - (s64)(ctrl->step / 2))
958c7c7e
HV		 1390 val = ctrl->maximum;
1391 else
9c9cb1fa 1392 val += (s64)(ctrl->step / 2);
0d5e8c43
HV		 1393 val = clamp_t(s64, val, ctrl->minimum, ctrl->maximum);
1394 offset = val - ctrl->minimum;
1395 do_div(offset, ctrl->step);
1396 ptr.p_s64[idx] = ctrl->minimum + offset * ctrl->step;
1397 return 0;
dda4a4d5
HV		 1398 case V4L2_CTRL_TYPE_U8:
1399 return ROUND_TO_RANGE(ptr.p_u8[idx], u8, ctrl);
1400 case V4L2_CTRL_TYPE_U16:
1401 return ROUND_TO_RANGE(ptr.p_u16[idx], u16, ctrl);
811c5081
HV		 1402 case V4L2_CTRL_TYPE_U32:
1403 return ROUND_TO_RANGE(ptr.p_u32[idx], u32, ctrl);
0176077a
HV		 1404
1405 case V4L2_CTRL_TYPE_BOOLEAN:
265c7f8a 1406 ptr.p_s32[idx] = !!ptr.p_s32[idx];
0176077a
HV		 1407 return 0;
1408
1409 case V4L2_CTRL_TYPE_MENU:
1410 case V4L2_CTRL_TYPE_INTEGER_MENU:
265c7f8a 1411 if (ptr.p_s32[idx] < ctrl->minimum || ptr.p_s32[idx] > ctrl->maximum)
0176077a 1412 return -ERANGE;
265c7f8a 1413 if (ctrl->menu_skip_mask & (1 << ptr.p_s32[idx]))
0176077a
HV		 1414 return -EINVAL;
1415 if (ctrl->type == V4L2_CTRL_TYPE_MENU &&
265c7f8a 1416 ctrl->qmenu[ptr.p_s32[idx]][0] == '\0')
0176077a
HV		 1417 return -EINVAL;
1418 return 0;
1419
1420 case V4L2_CTRL_TYPE_BITMASK:
265c7f8a 1421 ptr.p_s32[idx] &= ctrl->maximum;
0176077a
HV		 1422 return 0;
1423
1424 case V4L2_CTRL_TYPE_BUTTON:
1425 case V4L2_CTRL_TYPE_CTRL_CLASS:
265c7f8a 1426 ptr.p_s32[idx] = 0;
0176077a
HV		 1427 return 0;
1428
1429 case V4L2_CTRL_TYPE_STRING:
265c7f8a
HV		 1430 idx *= ctrl->elem_size;
1431 len = strlen(ptr.p_char + idx);
0176077a
HV		 1432 if (len < ctrl->minimum)
1433 return -ERANGE;
0d5e8c43 1434 if ((len - (u32)ctrl->minimum) % (u32)ctrl->step)
0176077a
HV		 1435 return -ERANGE;
1436 return 0;
1437
1438 default:
1439 return -EINVAL;
1440 }
1441}
1442
1443static const struct v4l2_ctrl_type_ops std_type_ops = {
1444 .equal = std_equal,
1445 .init = std_init,
1446 .log = std_log,
1447 .validate = std_validate,
1448};
1449
000e4f9a
HV		 1450/* Helper function: copy the given control value back to the caller */
1451static int ptr_to_user(struct v4l2_ext_control *c,
1452 struct v4l2_ctrl *ctrl,
1453 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1454{
1455 u32 len;
1456
d9a25471 1457 if (ctrl->is_ptr && !ctrl->is_string)
40265bbe
HV		 1458 return copy_to_user(c->ptr, ptr.p, c->size) ?
1459 -EFAULT : 0;
d9a25471 1460
0996517c
HV		 1461 switch (ctrl->type) {
1462 case V4L2_CTRL_TYPE_STRING:
000e4f9a 1463 len = strlen(ptr.p_char);
0996517c 1464 if (c->size < len + 1) {
c336f75e 1465 c->size = ctrl->elem_size;
0996517c
HV		 1466 return -ENOSPC;
1467 }
000e4f9a 1468 return copy_to_user(c->string, ptr.p_char, len + 1) ?
40265bbe 1469 -EFAULT : 0;
0996517c 1470 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1471 c->value64 = *ptr.p_s64;
0996517c
HV		 1472 break;
1473 default:
000e4f9a 1474 c->value = *ptr.p_s32;
0996517c
HV		 1475 break;
1476 }
1477 return 0;
1478}
1479
000e4f9a
HV		 1480/* Helper function: copy the current control value back to the caller */
1481static int cur_to_user(struct v4l2_ext_control *c,
0996517c 1482 struct v4l2_ctrl *ctrl)
000e4f9a
HV		 1483{
1484 return ptr_to_user(c, ctrl, ctrl->p_cur);
1485}
1486
1487/* Helper function: copy the new control value back to the caller */
1488static int new_to_user(struct v4l2_ext_control *c,
1489 struct v4l2_ctrl *ctrl)
1490{
1491 return ptr_to_user(c, ctrl, ctrl->p_new);
1492}
1493
953eae5d
RR		 1494/* Helper function: copy the initial control value back to the caller */
1495static int def_to_user(struct v4l2_ext_control *c, struct v4l2_ctrl *ctrl)
1496{
1497 int idx;
1498
1499 for (idx = 0; idx < ctrl->elems; idx++)
1500 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
1501
1502 return ptr_to_user(c, ctrl, ctrl->p_new);
1503}
1504
000e4f9a
HV		 1505/* Helper function: copy the caller-provider value to the given control value */
1506static int user_to_ptr(struct v4l2_ext_control *c,
1507 struct v4l2_ctrl *ctrl,
1508 union v4l2_ctrl_ptr ptr)
0996517c
HV		 1509{
1510 int ret;
1511 u32 size;
1512
2a863793 1513 ctrl->is_new = 1;
302ab7ce
HV		 1514 if (ctrl->is_ptr && !ctrl->is_string) {
1515 unsigned idx;
1516
40265bbe 1517 ret = copy_from_user(ptr.p, c->ptr, c->size) ? -EFAULT : 0;
302ab7ce
HV		 1518 if (ret || !ctrl->is_array)
1519 return ret;
1520 for (idx = c->size / ctrl->elem_size; idx < ctrl->elems; idx++)
1521 ctrl->type_ops->init(ctrl, idx, ptr);
1522 return 0;
1523 }
d9a25471 1524
0996517c
HV		 1525 switch (ctrl->type) {
1526 case V4L2_CTRL_TYPE_INTEGER64:
000e4f9a 1527 *ptr.p_s64 = c->value64;
0996517c
HV		 1528 break;
1529 case V4L2_CTRL_TYPE_STRING:
1530 size = c->size;
1531 if (size == 0)
1532 return -ERANGE;
1533 if (size > ctrl->maximum + 1)
1534 size = ctrl->maximum + 1;
40265bbe 1535 ret = copy_from_user(ptr.p_char, c->string, size) ? -EFAULT : 0;
0996517c 1536 if (!ret) {
000e4f9a 1537 char last = ptr.p_char[size - 1];
0996517c 1538
000e4f9a 1539 ptr.p_char[size - 1] = 0;
0996517c
HV		 1540 /* If the string was longer than ctrl->maximum,
1541 then return an error. */
000e4f9a 1542 if (strlen(ptr.p_char) == ctrl->maximum && last)
0996517c
HV		 1543 return -ERANGE;
1544 }
40265bbe 1545 return ret;
0996517c 1546 default:
000e4f9a 1547 *ptr.p_s32 = c->value;
0996517c
HV		 1548 break;
1549 }
1550 return 0;
1551}
1552
000e4f9a
HV		 1553/* Helper function: copy the caller-provider value as the new control value */
1554static int user_to_new(struct v4l2_ext_control *c,
0996517c
HV		 1555 struct v4l2_ctrl *ctrl)
1556{
000e4f9a
HV		 1557 return user_to_ptr(c, ctrl, ctrl->p_new);
1558}
d9a25471 1559
000e4f9a
HV		 1560/* Copy the one value to another. */
1561static void ptr_to_ptr(struct v4l2_ctrl *ctrl,
1562 union v4l2_ctrl_ptr from, union v4l2_ctrl_ptr to)
1563{
1564 if (ctrl == NULL)
1565 return;
302ab7ce 1566 memcpy(to.p, from.p, ctrl->elems * ctrl->elem_size);
0996517c
HV		 1567}
1568
1569/* Copy the new value to the current value. */
2ccbe779 1570static void new_to_cur(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c 1571{
000e4f9a 1572 bool changed;
6e239399 1573
0996517c
HV		 1574 if (ctrl == NULL)
1575 return;
9ea1b7a4
HV		 1576
1577 /* has_changed is set by cluster_changed */
1578 changed = ctrl->has_changed;
1579 if (changed)
1580 ptr_to_ptr(ctrl, ctrl->p_new, ctrl->p_cur);
d9a25471 1581
2ccbe779
SN		 1582 if (ch_flags & V4L2_EVENT_CTRL_CH_FLAGS) {
1583 /* Note: CH_FLAGS is only set for auto clusters. */
5626b8c7
HV		 1584 ctrl->flags &=
1585 ~(V4L2_CTRL_FLAG_INACTIVE | V4L2_CTRL_FLAG_VOLATILE);
1586 if (!is_cur_manual(ctrl->cluster[0])) {
72d877ca 1587 ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
5626b8c7
HV		 1588 if (ctrl->cluster[0]->has_volatiles)
1589 ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
1590 }
1249a3a8 1591 fh = NULL;
72d877ca 1592 }
2ccbe779 1593 if (changed || ch_flags) {
639884a6
HV		 1594 /* If a control was changed that was not one of the controls
1595 modified by the application, then send the event to all. */
1596 if (!ctrl->is_new)
1597 fh = NULL;
6e239399 1598 send_event(fh, ctrl,
2ccbe779 1599 (changed ? V4L2_EVENT_CTRL_CH_VALUE : 0) | ch_flags);
8ac7a949
HV		 1600 if (ctrl->call_notify && changed && ctrl->handler->notify)
1601 ctrl->handler->notify(ctrl, ctrl->handler->notify_priv);
639884a6 1602 }
0996517c
HV		 1603}
1604
1605/* Copy the current value to the new value */
1606static void cur_to_new(struct v4l2_ctrl *ctrl)
1607{
1608 if (ctrl == NULL)
1609 return;
000e4f9a 1610 ptr_to_ptr(ctrl, ctrl->p_cur, ctrl->p_new);
0996517c
HV		 1611}
1612
1613/* Return non-zero if one or more of the controls in the cluster has a new
1614 value that differs from the current value. */
1615static int cluster_changed(struct v4l2_ctrl *master)
1616{
9ea1b7a4 1617 bool changed = false;
302ab7ce 1618 unsigned idx;
0996517c
HV		 1619 int i;
1620
9ea1b7a4 1621 for (i = 0; i < master->ncontrols; i++) {
0996517c 1622 struct v4l2_ctrl *ctrl = master->cluster[i];
302ab7ce 1623 bool ctrl_changed = false;
0996517c
HV		 1624
1625 if (ctrl == NULL)
1626 continue;
45f014c5
RR		 1627
1628 if (ctrl->flags & V4L2_CTRL_FLAG_EXECUTE_ON_WRITE)
1629 changed = ctrl_changed = true;
1630
b08d8d26
RR		 1631 /*
1632 * Set has_changed to false to avoid generating
1633 * the event V4L2_EVENT_CTRL_CH_VALUE
1634 */
1635 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
1636 ctrl->has_changed = false;
1637 continue;
1638 }
1639
302ab7ce
HV		 1640 for (idx = 0; !ctrl_changed && idx < ctrl->elems; idx++)
1641 ctrl_changed = !ctrl->type_ops->equal(ctrl, idx,
998e7659 1642 ctrl->p_cur, ctrl->p_new);
302ab7ce 1643 ctrl->has_changed = ctrl_changed;
9ea1b7a4 1644 changed |= ctrl->has_changed;
0996517c 1645 }
9ea1b7a4 1646 return changed;
0996517c
HV		 1647}
1648
2ccbe779
SN		 1649/* Control range checking */
1650static int check_range(enum v4l2_ctrl_type type,
0ba2aeb6 1651 s64 min, s64 max, u64 step, s64 def)
2ccbe779
SN		 1652{
1653 switch (type) {
1654 case V4L2_CTRL_TYPE_BOOLEAN:
1655 if (step != 1 || max > 1 || min < 0)
1656 return -ERANGE;
1657 /* fall through */
dda4a4d5
HV		 1658 case V4L2_CTRL_TYPE_U8:
1659 case V4L2_CTRL_TYPE_U16:
811c5081 1660 case V4L2_CTRL_TYPE_U32:
2ccbe779 1661 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6
HV		 1662 case V4L2_CTRL_TYPE_INTEGER64:
1663 if (step == 0 || min > max || def < min || def > max)
2ccbe779
SN		 1664 return -ERANGE;
1665 return 0;
1666 case V4L2_CTRL_TYPE_BITMASK:
1667 if (step || min || !max || (def & ~max))
1668 return -ERANGE;
1669 return 0;
1670 case V4L2_CTRL_TYPE_MENU:
1671 case V4L2_CTRL_TYPE_INTEGER_MENU:
1672 if (min > max || def < min || def > max)
1673 return -ERANGE;
1674 /* Note: step == menu_skip_mask for menu controls.
1675 So here we check if the default value is masked out. */
1676 if (step && ((1 << def) & step))
1677 return -EINVAL;
1678 return 0;
1679 case V4L2_CTRL_TYPE_STRING:
1680 if (min > max || min < 0 || step < 1 || def)
1681 return -ERANGE;
1682 return 0;
1683 default:
1684 return 0;
1685 }
1686}
1687
03d5285b 1688/* Validate a new control */
7a7f1ab3 1689static int validate_new(const struct v4l2_ctrl *ctrl, union v4l2_ctrl_ptr p_new)
0996517c 1690{
302ab7ce
HV		 1691 unsigned idx;
1692 int err = 0;
1693
7a7f1ab3
HV		 1694 for (idx = 0; !err && idx < ctrl->elems; idx++)
1695 err = ctrl->type_ops->validate(ctrl, idx, p_new);
302ab7ce 1696 return err;
0996517c
HV		 1697}
1698
1699static inline u32 node2id(struct list_head *node)
1700{
1701 return list_entry(node, struct v4l2_ctrl_ref, node)->ctrl->id;
1702}
1703
1704/* Set the handler's error code if it wasn't set earlier already */
1705static inline int handler_set_err(struct v4l2_ctrl_handler *hdl, int err)
1706{
1707 if (hdl->error == 0)
1708 hdl->error = err;
1709 return err;
1710}
1711
1712/* Initialize the handler */
6cd247ef
AW		 1713int v4l2_ctrl_handler_init_class(struct v4l2_ctrl_handler *hdl,
1714 unsigned nr_of_controls_hint,
1715 struct lock_class_key *key, const char *name)
0996517c 1716{
77e7c4e6
SA		 1717 hdl->lock = &hdl->_lock;
1718 mutex_init(hdl->lock);
6cd247ef 1719 lockdep_set_class_and_name(hdl->lock, key, name);
0996517c
HV		 1720 INIT_LIST_HEAD(&hdl->ctrls);
1721 INIT_LIST_HEAD(&hdl->ctrl_refs);
1722 hdl->nr_of_buckets = 1 + nr_of_controls_hint / 8;
9884d7be
TM		 1723 hdl->buckets = kcalloc(hdl->nr_of_buckets, sizeof(hdl->buckets[0]),
1724 GFP_KERNEL);
0996517c
HV		 1725 hdl->error = hdl->buckets ? 0 : -ENOMEM;
1726 return hdl->error;
1727}
6cd247ef 1728EXPORT_SYMBOL(v4l2_ctrl_handler_init_class);
0996517c
HV		 1729
1730/* Free all controls and control refs */
1731void v4l2_ctrl_handler_free(struct v4l2_ctrl_handler *hdl)
1732{
1733 struct v4l2_ctrl_ref *ref, *next_ref;
1734 struct v4l2_ctrl *ctrl, *next_ctrl;
77068d36 1735 struct v4l2_subscribed_event *sev, *next_sev;
0996517c
HV		 1736
1737 if (hdl == NULL || hdl->buckets == NULL)
1738 return;
1739
77e7c4e6 1740 mutex_lock(hdl->lock);
0996517c
HV		 1741 /* Free all nodes */
1742 list_for_each_entry_safe(ref, next_ref, &hdl->ctrl_refs, node) {
1743 list_del(&ref->node);
1744 kfree(ref);
1745 }
1746 /* Free all controls owned by the handler */
1747 list_for_each_entry_safe(ctrl, next_ctrl, &hdl->ctrls, node) {
1748 list_del(&ctrl->node);
77068d36
HV		 1749 list_for_each_entry_safe(sev, next_sev, &ctrl->ev_subs, node)
1750 list_del(&sev->node);
0996517c
HV		 1751 kfree(ctrl);
1752 }
1753 kfree(hdl->buckets);
1754 hdl->buckets = NULL;
1755 hdl->cached = NULL;
1756 hdl->error = 0;
77e7c4e6 1757 mutex_unlock(hdl->lock);
0996517c
HV		 1758}
1759EXPORT_SYMBOL(v4l2_ctrl_handler_free);
1760
1761/* For backwards compatibility: V4L2_CID_PRIVATE_BASE should no longer
1762 be used except in G_CTRL, S_CTRL, QUERYCTRL and QUERYMENU when dealing
1763 with applications that do not use the NEXT_CTRL flag.
1764
1765 We just find the n-th private user control. It's O(N), but that should not
1766 be an issue in this particular case. */
1767static struct v4l2_ctrl_ref *find_private_ref(
1768 struct v4l2_ctrl_handler *hdl, u32 id)
1769{
1770 struct v4l2_ctrl_ref *ref;
1771
1772 id -= V4L2_CID_PRIVATE_BASE;
1773 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1774 /* Search for private user controls that are compatible with
1775 VIDIOC_G/S_CTRL. */
0f8017be 1776 if (V4L2_CTRL_ID2WHICH(ref->ctrl->id) == V4L2_CTRL_CLASS_USER &&
0996517c 1777 V4L2_CTRL_DRIVER_PRIV(ref->ctrl->id)) {
d9a25471 1778 if (!ref->ctrl->is_int)
0996517c
HV		 1779 continue;
1780 if (id == 0)
1781 return ref;
1782 id--;
1783 }
1784 }
1785 return NULL;
1786}
1787
1788/* Find a control with the given ID. */
1789static struct v4l2_ctrl_ref *find_ref(struct v4l2_ctrl_handler *hdl, u32 id)
1790{
1791 struct v4l2_ctrl_ref *ref;
1792 int bucket;
1793
1794 id &= V4L2_CTRL_ID_MASK;
1795
1796 /* Old-style private controls need special handling */
1797 if (id >= V4L2_CID_PRIVATE_BASE)
1798 return find_private_ref(hdl, id);
1799 bucket = id % hdl->nr_of_buckets;
1800
1801 /* Simple optimization: cache the last control found */
1802 if (hdl->cached && hdl->cached->ctrl->id == id)
1803 return hdl->cached;
1804
1805 /* Not in cache, search the hash */
1806 ref = hdl->buckets ? hdl->buckets[bucket] : NULL;
1807 while (ref && ref->ctrl->id != id)
1808 ref = ref->next;
1809
1810 if (ref)
1811 hdl->cached = ref; /* cache it! */
1812 return ref;
1813}
1814
1815/* Find a control with the given ID. Take the handler's lock first. */
1816static struct v4l2_ctrl_ref *find_ref_lock(
1817 struct v4l2_ctrl_handler *hdl, u32 id)
1818{
1819 struct v4l2_ctrl_ref *ref = NULL;
1820
1821 if (hdl) {
77e7c4e6 1822 mutex_lock(hdl->lock);
0996517c 1823 ref = find_ref(hdl, id);
77e7c4e6 1824 mutex_unlock(hdl->lock);
0996517c
HV		 1825 }
1826 return ref;
1827}
1828
1829/* Find a control with the given ID. */
1830struct v4l2_ctrl *v4l2_ctrl_find(struct v4l2_ctrl_handler *hdl, u32 id)
1831{
1832 struct v4l2_ctrl_ref *ref = find_ref_lock(hdl, id);
1833
1834 return ref ? ref->ctrl : NULL;
1835}
1836EXPORT_SYMBOL(v4l2_ctrl_find);
1837
1838/* Allocate a new v4l2_ctrl_ref and hook it into the handler. */
1839static int handler_new_ref(struct v4l2_ctrl_handler *hdl,
1840 struct v4l2_ctrl *ctrl)
1841{
1842 struct v4l2_ctrl_ref *ref;
1843 struct v4l2_ctrl_ref *new_ref;
1844 u32 id = ctrl->id;
0f8017be 1845 u32 class_ctrl = V4L2_CTRL_ID2WHICH(id) | 1;
0996517c
HV		 1846 int bucket = id % hdl->nr_of_buckets; /* which bucket to use */
1847
d9a25471
HV		 1848 /*
1849 * Automatically add the control class if it is not yet present and
1850 * the new control is not a compound control.
1851 */
1852 if (ctrl->type < V4L2_CTRL_COMPOUND_TYPES &&
1853 id != class_ctrl && find_ref_lock(hdl, class_ctrl) == NULL)
0996517c
HV		 1854 if (!v4l2_ctrl_new_std(hdl, NULL, class_ctrl, 0, 0, 0, 0))
1855 return hdl->error;
1856
1857 if (hdl->error)
1858 return hdl->error;
1859
1860 new_ref = kzalloc(sizeof(*new_ref), GFP_KERNEL);
1861 if (!new_ref)
1862 return handler_set_err(hdl, -ENOMEM);
1863 new_ref->ctrl = ctrl;
1864 if (ctrl->handler == hdl) {
1865 /* By default each control starts in a cluster of its own.
1866 new_ref->ctrl is basically a cluster array with one
1867 element, so that's perfect to use as the cluster pointer.
1868 But only do this for the handler that owns the control. */
1869 ctrl->cluster = &new_ref->ctrl;
1870 ctrl->ncontrols = 1;
1871 }
1872
1873 INIT_LIST_HEAD(&new_ref->node);
1874
77e7c4e6 1875 mutex_lock(hdl->lock);
0996517c
HV		 1876
1877 /* Add immediately at the end of the list if the list is empty, or if
1878 the last element in the list has a lower ID.
1879 This ensures that when elements are added in ascending order the
1880 insertion is an O(1) operation. */
1881 if (list_empty(&hdl->ctrl_refs) || id > node2id(hdl->ctrl_refs.prev)) {
1882 list_add_tail(&new_ref->node, &hdl->ctrl_refs);
1883 goto insert_in_hash;
1884 }
1885
1886 /* Find insert position in sorted list */
1887 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
1888 if (ref->ctrl->id < id)
1889 continue;
1890 /* Don't add duplicates */
1891 if (ref->ctrl->id == id) {
1892 kfree(new_ref);
1893 goto unlock;
1894 }
1895 list_add(&new_ref->node, ref->node.prev);
1896 break;
1897 }
1898
1899insert_in_hash:
1900 /* Insert the control node in the hash */
1901 new_ref->next = hdl->buckets[bucket];
1902 hdl->buckets[bucket] = new_ref;
1903
1904unlock:
77e7c4e6 1905 mutex_unlock(hdl->lock);
0996517c
HV		 1906 return 0;
1907}
1908
1909/* Add a new control */
1910static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
1911 const struct v4l2_ctrl_ops *ops,
0176077a 1912 const struct v4l2_ctrl_type_ops *type_ops,
0996517c 1913 u32 id, const char *name, enum v4l2_ctrl_type type,
0ba2aeb6 1914 s64 min, s64 max, u64 step, s64 def,
20d88eef 1915 const u32 dims[V4L2_CTRL_MAX_DIMS], u32 elem_size,
ce580fe5
SA		 1916 u32 flags, const char * const *qmenu,
1917 const s64 *qmenu_int, void *priv)
0996517c
HV		 1918{
1919 struct v4l2_ctrl *ctrl;
d9a25471 1920 unsigned sz_extra;
20d88eef
HV		 1921 unsigned nr_of_dims = 0;
1922 unsigned elems = 1;
998e7659
HV		 1923 bool is_array;
1924 unsigned tot_ctrl_size;
302ab7ce 1925 unsigned idx;
d9a25471 1926 void *data;
2ccbe779 1927 int err;
0996517c
HV		 1928
1929 if (hdl->error)
1930 return NULL;
1931
20d88eef
HV		 1932 while (dims && dims[nr_of_dims]) {
1933 elems *= dims[nr_of_dims];
1934 nr_of_dims++;
1935 if (nr_of_dims == V4L2_CTRL_MAX_DIMS)
1936 break;
1937 }
998e7659 1938 is_array = nr_of_dims > 0;
20d88eef 1939
dda4a4d5
HV		 1940 /* Prefill elem_size for all types handled by std_type_ops */
1941 switch (type) {
1942 case V4L2_CTRL_TYPE_INTEGER64:
d9a25471 1943 elem_size = sizeof(s64);
dda4a4d5
HV		 1944 break;
1945 case V4L2_CTRL_TYPE_STRING:
d9a25471 1946 elem_size = max + 1;
dda4a4d5
HV		 1947 break;
1948 case V4L2_CTRL_TYPE_U8:
1949 elem_size = sizeof(u8);
1950 break;
1951 case V4L2_CTRL_TYPE_U16:
1952 elem_size = sizeof(u16);
1953 break;
811c5081
HV		 1954 case V4L2_CTRL_TYPE_U32:
1955 elem_size = sizeof(u32);
1956 break;
dda4a4d5
HV		 1957 default:
1958 if (type < V4L2_CTRL_COMPOUND_TYPES)
1959 elem_size = sizeof(s32);
1960 break;
1961 }
998e7659 1962 tot_ctrl_size = elem_size * elems;
d9a25471 1963
0996517c 1964 /* Sanity checks */
998e7659
HV		 1965 if (id == 0 || name == NULL || !elem_size ||
1966 id >= V4L2_CID_PRIVATE_BASE ||
0996517c 1967 (type == V4L2_CTRL_TYPE_MENU && qmenu == NULL) ||
2ccbe779 1968 (type == V4L2_CTRL_TYPE_INTEGER_MENU && qmenu_int == NULL)) {
fa4d7096
HV		 1969 handler_set_err(hdl, -ERANGE);
1970 return NULL;
1971 }
2ccbe779
SN		 1972 err = check_range(type, min, max, step, def);
1973 if (err) {
1974 handler_set_err(hdl, err);
02ac0480
HV		 1975 return NULL;
1976 }
fa4d7096
HV		 1977 if (type == V4L2_CTRL_TYPE_BITMASK && ((def & ~max) || min || step)) {
1978 handler_set_err(hdl, -ERANGE);
1979 return NULL;
1980 }
998e7659
HV		 1981 if (is_array &&
1982 (type == V4L2_CTRL_TYPE_BUTTON ||
1983 type == V4L2_CTRL_TYPE_CTRL_CLASS)) {
1984 handler_set_err(hdl, -EINVAL);
1985 return NULL;
1986 }
0996517c 1987
d9a25471 1988 sz_extra = 0;
0996517c 1989 if (type == V4L2_CTRL_TYPE_BUTTON)
ef66c0ca
RR		 1990 flags |= V4L2_CTRL_FLAG_WRITE_ONLY |
1991 V4L2_CTRL_FLAG_EXECUTE_ON_WRITE;
0996517c
HV		 1992 else if (type == V4L2_CTRL_TYPE_CTRL_CLASS)
1993 flags |= V4L2_CTRL_FLAG_READ_ONLY;
2a9ec373
HV		 1994 else if (type == V4L2_CTRL_TYPE_INTEGER64 ||
1995 type == V4L2_CTRL_TYPE_STRING ||
998e7659
HV		 1996 type >= V4L2_CTRL_COMPOUND_TYPES ||
1997 is_array)
1998 sz_extra += 2 * tot_ctrl_size;
0996517c
HV		 1999
2000 ctrl = kzalloc(sizeof(*ctrl) + sz_extra, GFP_KERNEL);
2001 if (ctrl == NULL) {
2002 handler_set_err(hdl, -ENOMEM);
2003 return NULL;
2004 }
2005
2006 INIT_LIST_HEAD(&ctrl->node);
77068d36 2007 INIT_LIST_HEAD(&ctrl->ev_subs);
0996517c
HV		 2008 ctrl->handler = hdl;
2009 ctrl->ops = ops;
0176077a 2010 ctrl->type_ops = type_ops ? type_ops : &std_type_ops;
0996517c
HV		 2011 ctrl->id = id;
2012 ctrl->name = name;
2013 ctrl->type = type;
2014 ctrl->flags = flags;
2015 ctrl->minimum = min;
2016 ctrl->maximum = max;
2017 ctrl->step = step;
d9a25471 2018 ctrl->default_value = def;
998e7659
HV		 2019 ctrl->is_string = !is_array && type == V4L2_CTRL_TYPE_STRING;
2020 ctrl->is_ptr = is_array || type >= V4L2_CTRL_COMPOUND_TYPES || ctrl->is_string;
d9a25471 2021 ctrl->is_int = !ctrl->is_ptr && type != V4L2_CTRL_TYPE_INTEGER64;
998e7659 2022 ctrl->is_array = is_array;
20d88eef
HV		 2023 ctrl->elems = elems;
2024 ctrl->nr_of_dims = nr_of_dims;
2025 if (nr_of_dims)
2026 memcpy(ctrl->dims, dims, nr_of_dims * sizeof(dims[0]));
d9a25471 2027 ctrl->elem_size = elem_size;
ce580fe5
SA		 2028 if (type == V4L2_CTRL_TYPE_MENU)
2029 ctrl->qmenu = qmenu;
2030 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2031 ctrl->qmenu_int = qmenu_int;
0996517c 2032 ctrl->priv = priv;
d9a25471 2033 ctrl->cur.val = ctrl->val = def;
2a9ec373 2034 data = &ctrl[1];
d9a25471 2035
2a9ec373
HV		 2036 if (!ctrl->is_int) {
2037 ctrl->p_new.p = data;
998e7659 2038 ctrl->p_cur.p = data + tot_ctrl_size;
0176077a
HV		 2039 } else {
2040 ctrl->p_new.p = &ctrl->val;
2041 ctrl->p_cur.p = &ctrl->cur.val;
0996517c 2042 }
302ab7ce
HV		 2043 for (idx = 0; idx < elems; idx++) {
2044 ctrl->type_ops->init(ctrl, idx, ctrl->p_cur);
2045 ctrl->type_ops->init(ctrl, idx, ctrl->p_new);
2046 }
0176077a 2047
0996517c
HV		 2048 if (handler_new_ref(hdl, ctrl)) {
2049 kfree(ctrl);
2050 return NULL;
2051 }
77e7c4e6 2052 mutex_lock(hdl->lock);
0996517c 2053 list_add_tail(&ctrl->node, &hdl->ctrls);
77e7c4e6 2054 mutex_unlock(hdl->lock);
0996517c
HV		 2055 return ctrl;
2056}
2057
2058struct v4l2_ctrl *v4l2_ctrl_new_custom(struct v4l2_ctrl_handler *hdl,
2059 const struct v4l2_ctrl_config *cfg, void *priv)
2060{
2061 bool is_menu;
2062 struct v4l2_ctrl *ctrl;
2063 const char *name = cfg->name;
513521ea 2064 const char * const *qmenu = cfg->qmenu;
ce580fe5 2065 const s64 *qmenu_int = cfg->qmenu_int;
0996517c
HV		 2066 enum v4l2_ctrl_type type = cfg->type;
2067 u32 flags = cfg->flags;
0ba2aeb6
HV		 2068 s64 min = cfg->min;
2069 s64 max = cfg->max;
2070 u64 step = cfg->step;
2071 s64 def = cfg->def;
0996517c
HV		 2072
2073 if (name == NULL)
2074 v4l2_ctrl_fill(cfg->id, &name, &type, &min, &max, &step,
2075 &def, &flags);
2076
ce580fe5
SA		 2077 is_menu = (cfg->type == V4L2_CTRL_TYPE_MENU ||
2078 cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU);
0996517c
HV		 2079 if (is_menu)
2080 WARN_ON(step);
2081 else
2082 WARN_ON(cfg->menu_skip_mask);
ce580fe5 2083 if (cfg->type == V4L2_CTRL_TYPE_MENU && qmenu == NULL)
0996517c 2084 qmenu = v4l2_ctrl_get_menu(cfg->id);
ce580fe5
SA		 2085 else if (cfg->type == V4L2_CTRL_TYPE_INTEGER_MENU &&
2086 qmenu_int == NULL) {
2087 handler_set_err(hdl, -EINVAL);
2088 return NULL;
2089 }
0996517c 2090
0176077a 2091 ctrl = v4l2_ctrl_new(hdl, cfg->ops, cfg->type_ops, cfg->id, name,
0996517c 2092 type, min, max,
20d88eef
HV		 2093 is_menu ? cfg->menu_skip_mask : step, def,
2094 cfg->dims, cfg->elem_size,
d9a25471 2095 flags, qmenu, qmenu_int, priv);
88365105 2096 if (ctrl)
0996517c 2097 ctrl->is_private = cfg->is_private;
0996517c
HV		 2098 return ctrl;
2099}
2100EXPORT_SYMBOL(v4l2_ctrl_new_custom);
2101
2102/* Helper function for standard non-menu controls */
2103struct v4l2_ctrl *v4l2_ctrl_new_std(struct v4l2_ctrl_handler *hdl,
2104 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2105 u32 id, s64 min, s64 max, u64 step, s64 def)
0996517c
HV		 2106{
2107 const char *name;
2108 enum v4l2_ctrl_type type;
2109 u32 flags;
2110
2111 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d9a25471
HV		 2112 if (type == V4L2_CTRL_TYPE_MENU ||
2113 type == V4L2_CTRL_TYPE_INTEGER_MENU ||
2114 type >= V4L2_CTRL_COMPOUND_TYPES) {
0996517c
HV		 2115 handler_set_err(hdl, -EINVAL);
2116 return NULL;
2117 }
0176077a 2118 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2119 min, max, step, def, NULL, 0,
d9a25471 2120 flags, NULL, NULL, NULL);
0996517c
HV		 2121}
2122EXPORT_SYMBOL(v4l2_ctrl_new_std);
2123
2124/* Helper function for standard menu controls */
2125struct v4l2_ctrl *v4l2_ctrl_new_std_menu(struct v4l2_ctrl_handler *hdl,
2126 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2127 u32 id, u8 _max, u64 mask, u8 _def)
0996517c 2128{
d1e9b7c1
SN		 2129 const char * const *qmenu = NULL;
2130 const s64 *qmenu_int = NULL;
fbbb29a6 2131 unsigned int qmenu_int_len = 0;
0996517c
HV		 2132 const char *name;
2133 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2134 s64 min;
2135 s64 max = _max;
2136 s64 def = _def;
2137 u64 step;
0996517c
HV		 2138 u32 flags;
2139
2140 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
d1e9b7c1
SN		 2141
2142 if (type == V4L2_CTRL_TYPE_MENU)
2143 qmenu = v4l2_ctrl_get_menu(id);
2144 else if (type == V4L2_CTRL_TYPE_INTEGER_MENU)
2145 qmenu_int = v4l2_ctrl_get_int_menu(id, &qmenu_int_len);
2146
2147 if ((!qmenu && !qmenu_int) || (qmenu_int && max > qmenu_int_len)) {
0996517c
HV		 2148 handler_set_err(hdl, -EINVAL);
2149 return NULL;
2150 }
0176077a 2151 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2152 0, max, mask, def, NULL, 0,
d9a25471 2153 flags, qmenu, qmenu_int, NULL);
0996517c
HV		 2154}
2155EXPORT_SYMBOL(v4l2_ctrl_new_std_menu);
2156
117a711a
LP		 2157/* Helper function for standard menu controls with driver defined menu */
2158struct v4l2_ctrl *v4l2_ctrl_new_std_menu_items(struct v4l2_ctrl_handler *hdl,
0ba2aeb6
HV		 2159 const struct v4l2_ctrl_ops *ops, u32 id, u8 _max,
2160 u64 mask, u8 _def, const char * const *qmenu)
117a711a
LP		 2161{
2162 enum v4l2_ctrl_type type;
2163 const char *name;
2164 u32 flags;
0ba2aeb6
HV		 2165 u64 step;
2166 s64 min;
2167 s64 max = _max;
2168 s64 def = _def;
117a711a
LP		 2169
2170 /* v4l2_ctrl_new_std_menu_items() should only be called for
2171 * standard controls without a standard menu.
2172 */
2173 if (v4l2_ctrl_get_menu(id)) {
2174 handler_set_err(hdl, -EINVAL);
2175 return NULL;
2176 }
2177
2178 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2179 if (type != V4L2_CTRL_TYPE_MENU || qmenu == NULL) {
2180 handler_set_err(hdl, -EINVAL);
2181 return NULL;
2182 }
0176077a 2183 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef
HV		 2184 0, max, mask, def, NULL, 0,
2185 flags, qmenu, NULL, NULL);
117a711a
LP		 2186
2187}
2188EXPORT_SYMBOL(v4l2_ctrl_new_std_menu_items);
2189
515f3287
SN		 2190/* Helper function for standard integer menu controls */
2191struct v4l2_ctrl *v4l2_ctrl_new_int_menu(struct v4l2_ctrl_handler *hdl,
2192 const struct v4l2_ctrl_ops *ops,
0ba2aeb6 2193 u32 id, u8 _max, u8 _def, const s64 *qmenu_int)
515f3287
SN		 2194{
2195 const char *name;
2196 enum v4l2_ctrl_type type;
0ba2aeb6
HV		 2197 s64 min;
2198 u64 step;
2199 s64 max = _max;
2200 s64 def = _def;
515f3287
SN		 2201 u32 flags;
2202
2203 v4l2_ctrl_fill(id, &name, &type, &min, &max, &step, &def, &flags);
2204 if (type != V4L2_CTRL_TYPE_INTEGER_MENU) {
2205 handler_set_err(hdl, -EINVAL);
2206 return NULL;
2207 }
0176077a 2208 return v4l2_ctrl_new(hdl, ops, NULL, id, name, type,
20d88eef 2209 0, max, 0, def, NULL, 0,
d9a25471 2210 flags, NULL, qmenu_int, NULL);
515f3287
SN		 2211}
2212EXPORT_SYMBOL(v4l2_ctrl_new_int_menu);
2213
0996517c
HV		 2214/* Add a control from another handler to this handler */
2215struct v4l2_ctrl *v4l2_ctrl_add_ctrl(struct v4l2_ctrl_handler *hdl,
2216 struct v4l2_ctrl *ctrl)
2217{
2218 if (hdl == NULL || hdl->error)
2219 return NULL;
2220 if (ctrl == NULL) {
2221 handler_set_err(hdl, -EINVAL);
2222 return NULL;
2223 }
2224 if (ctrl->handler == hdl)
2225 return ctrl;
2226 return handler_new_ref(hdl, ctrl) ? NULL : ctrl;
2227}
2228EXPORT_SYMBOL(v4l2_ctrl_add_ctrl);
2229
2230/* Add the controls from another handler to our own. */
2231int v4l2_ctrl_add_handler(struct v4l2_ctrl_handler *hdl,
34a6b7d0
HV		 2232 struct v4l2_ctrl_handler *add,
2233 bool (*filter)(const struct v4l2_ctrl *ctrl))
0996517c 2234{
072e6602 2235 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2236 int ret = 0;
2237
2238 /* Do nothing if either handler is NULL or if they are the same */
2239 if (!hdl || !add || hdl == add)
2240 return 0;
2241 if (hdl->error)
2242 return hdl->error;
77e7c4e6 2243 mutex_lock(add->lock);
072e6602
HV		 2244 list_for_each_entry(ref, &add->ctrl_refs, node) {
2245 struct v4l2_ctrl *ctrl = ref->ctrl;
2246
0996517c
HV		 2247 /* Skip handler-private controls. */
2248 if (ctrl->is_private)
2249 continue;
6e239399
HV		 2250 /* And control classes */
2251 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2252 continue;
34a6b7d0
HV		 2253 /* Filter any unwanted controls */
2254 if (filter && !filter(ctrl))
2255 continue;
0996517c
HV		 2256 ret = handler_new_ref(hdl, ctrl);
2257 if (ret)
2258 break;
2259 }
77e7c4e6 2260 mutex_unlock(add->lock);
0996517c
HV		 2261 return ret;
2262}
2263EXPORT_SYMBOL(v4l2_ctrl_add_handler);
2264
34a6b7d0
HV		 2265bool v4l2_ctrl_radio_filter(const struct v4l2_ctrl *ctrl)
2266{
0f8017be 2267 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_TX)
34a6b7d0 2268 return true;
0f8017be 2269 if (V4L2_CTRL_ID2WHICH(ctrl->id) == V4L2_CTRL_CLASS_FM_RX)
3963d4fb 2270 return true;
34a6b7d0
HV		 2271 switch (ctrl->id) {
2272 case V4L2_CID_AUDIO_MUTE:
2273 case V4L2_CID_AUDIO_VOLUME:
2274 case V4L2_CID_AUDIO_BALANCE:
2275 case V4L2_CID_AUDIO_BASS:
2276 case V4L2_CID_AUDIO_TREBLE:
2277 case V4L2_CID_AUDIO_LOUDNESS:
2278 return true;
2279 default:
2280 break;
2281 }
2282 return false;
2283}
2284EXPORT_SYMBOL(v4l2_ctrl_radio_filter);
2285
0996517c
HV		 2286/* Cluster controls */
2287void v4l2_ctrl_cluster(unsigned ncontrols, struct v4l2_ctrl **controls)
2288{
5626b8c7 2289 bool has_volatiles = false;
0996517c
HV		 2290 int i;
2291
2292 /* The first control is the master control and it must not be NULL */
c817d927
HV		 2293 if (WARN_ON(ncontrols == 0 || controls[0] == NULL))
2294 return;
0996517c
HV		 2295
2296 for (i = 0; i < ncontrols; i++) {
2297 if (controls[i]) {
2298 controls[i]->cluster = controls;
2299 controls[i]->ncontrols = ncontrols;
5626b8c7
HV		 2300 if (controls[i]->flags & V4L2_CTRL_FLAG_VOLATILE)
2301 has_volatiles = true;
0996517c
HV		 2302 }
2303 }
5626b8c7 2304 controls[0]->has_volatiles = has_volatiles;
0996517c
HV		 2305}
2306EXPORT_SYMBOL(v4l2_ctrl_cluster);
2307
72d877ca
HV		 2308void v4l2_ctrl_auto_cluster(unsigned ncontrols, struct v4l2_ctrl **controls,
2309 u8 manual_val, bool set_volatile)
2310{
2311 struct v4l2_ctrl *master = controls[0];
5626b8c7 2312 u32 flag = 0;
72d877ca
HV		 2313 int i;
2314
2315 v4l2_ctrl_cluster(ncontrols, controls);
2316 WARN_ON(ncontrols <= 1);
82a7c049 2317 WARN_ON(manual_val < master->minimum || manual_val > master->maximum);
5626b8c7 2318 WARN_ON(set_volatile && !has_op(master, g_volatile_ctrl));
72d877ca 2319 master->is_auto = true;
5626b8c7 2320 master->has_volatiles = set_volatile;
72d877ca
HV		 2321 master->manual_mode_value = manual_val;
2322 master->flags |= V4L2_CTRL_FLAG_UPDATE;
5626b8c7
HV		 2323
2324 if (!is_cur_manual(master))
2325 flag = V4L2_CTRL_FLAG_INACTIVE |
2326 (set_volatile ? V4L2_CTRL_FLAG_VOLATILE : 0);
72d877ca
HV		 2327
2328 for (i = 1; i < ncontrols; i++)
88365105 2329 if (controls[i])
72d877ca 2330 controls[i]->flags |= flag;
72d877ca
HV		 2331}
2332EXPORT_SYMBOL(v4l2_ctrl_auto_cluster);
2333
0996517c
HV		 2334/* Activate/deactivate a control. */
2335void v4l2_ctrl_activate(struct v4l2_ctrl *ctrl, bool active)
2336{
6e239399
HV		 2337 /* invert since the actual flag is called 'inactive' */
2338 bool inactive = !active;
2339 bool old;
2340
0996517c
HV		 2341 if (ctrl == NULL)
2342 return;
2343
6e239399 2344 if (inactive)
0996517c 2345 /* set V4L2_CTRL_FLAG_INACTIVE */
6e239399 2346 old = test_and_set_bit(4, &ctrl->flags);
0996517c
HV		 2347 else
2348 /* clear V4L2_CTRL_FLAG_INACTIVE */
6e239399
HV		 2349 old = test_and_clear_bit(4, &ctrl->flags);
2350 if (old != inactive)
2351 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
0996517c
HV		 2352}
2353EXPORT_SYMBOL(v4l2_ctrl_activate);
2354
2355/* Grab/ungrab a control.
2356 Typically used when streaming starts and you want to grab controls,
2357 preventing the user from changing them.
2358
2359 Just call this and the framework will block any attempts to change
2360 these controls. */
2361void v4l2_ctrl_grab(struct v4l2_ctrl *ctrl, bool grabbed)
2362{
6e239399
HV		 2363 bool old;
2364
0996517c
HV		 2365 if (ctrl == NULL)
2366 return;
2367
6e239399 2368 v4l2_ctrl_lock(ctrl);
0996517c
HV		 2369 if (grabbed)
2370 /* set V4L2_CTRL_FLAG_GRABBED */
6e239399 2371 old = test_and_set_bit(1, &ctrl->flags);
0996517c
HV		 2372 else
2373 /* clear V4L2_CTRL_FLAG_GRABBED */
6e239399
HV		 2374 old = test_and_clear_bit(1, &ctrl->flags);
2375 if (old != grabbed)
2376 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_FLAGS);
2377 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 2378}
2379EXPORT_SYMBOL(v4l2_ctrl_grab);
2380
2381/* Log the control name and value */
2382static void log_ctrl(const struct v4l2_ctrl *ctrl,
2383 const char *prefix, const char *colon)
2384{
0996517c
HV		 2385 if (ctrl->flags & (V4L2_CTRL_FLAG_DISABLED | V4L2_CTRL_FLAG_WRITE_ONLY))
2386 return;
2387 if (ctrl->type == V4L2_CTRL_TYPE_CTRL_CLASS)
2388 return;
2389
7eafbce9 2390 pr_info("%s%s%s: ", prefix, colon, ctrl->name);
0996517c 2391
0176077a
HV		 2392 ctrl->type_ops->log(ctrl);
2393
88365105
HV		 2394 if (ctrl->flags & (V4L2_CTRL_FLAG_INACTIVE |
2395 V4L2_CTRL_FLAG_GRABBED |
2396 V4L2_CTRL_FLAG_VOLATILE)) {
2397 if (ctrl->flags & V4L2_CTRL_FLAG_INACTIVE)
7eafbce9 2398 pr_cont(" inactive");
88365105 2399 if (ctrl->flags & V4L2_CTRL_FLAG_GRABBED)
7eafbce9 2400 pr_cont(" grabbed");
88365105 2401 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE)
7eafbce9 2402 pr_cont(" volatile");
88365105 2403 }
7eafbce9 2404 pr_cont("\n");
0996517c
HV		 2405}
2406
2407/* Log all controls owned by the handler */
2408void v4l2_ctrl_handler_log_status(struct v4l2_ctrl_handler *hdl,
2409 const char *prefix)
2410{
2411 struct v4l2_ctrl *ctrl;
2412 const char *colon = "";
2413 int len;
2414
2415 if (hdl == NULL)
2416 return;
2417 if (prefix == NULL)
2418 prefix = "";
2419 len = strlen(prefix);
2420 if (len && prefix[len - 1] != ' ')
2421 colon = ": ";
77e7c4e6 2422 mutex_lock(hdl->lock);
0996517c
HV		 2423 list_for_each_entry(ctrl, &hdl->ctrls, node)
2424 if (!(ctrl->flags & V4L2_CTRL_FLAG_DISABLED))
2425 log_ctrl(ctrl, prefix, colon);
77e7c4e6 2426 mutex_unlock(hdl->lock);
0996517c
HV		 2427}
2428EXPORT_SYMBOL(v4l2_ctrl_handler_log_status);
2429
ffa9b9f0
SN		 2430int v4l2_ctrl_subdev_log_status(struct v4l2_subdev *sd)
2431{
2432 v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
2433 return 0;
2434}
2435EXPORT_SYMBOL(v4l2_ctrl_subdev_log_status);
2436
0996517c
HV		 2437/* Call s_ctrl for all controls owned by the handler */
2438int v4l2_ctrl_handler_setup(struct v4l2_ctrl_handler *hdl)
2439{
2440 struct v4l2_ctrl *ctrl;
2441 int ret = 0;
2442
2443 if (hdl == NULL)
2444 return 0;
77e7c4e6 2445 mutex_lock(hdl->lock);
0996517c
HV		 2446 list_for_each_entry(ctrl, &hdl->ctrls, node)
2447 ctrl->done = false;
2448
2449 list_for_each_entry(ctrl, &hdl->ctrls, node) {
2450 struct v4l2_ctrl *master = ctrl->cluster[0];
2451 int i;
2452
2453 /* Skip if this control was already handled by a cluster. */
71c6c4c9
HV		 2454 /* Skip button controls and read-only controls. */
2455 if (ctrl->done || ctrl->type == V4L2_CTRL_TYPE_BUTTON ||
2456 (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY))
0996517c
HV		 2457 continue;
2458
2a863793
HV		 2459 for (i = 0; i < master->ncontrols; i++) {
2460 if (master->cluster[i]) {
2461 cur_to_new(master->cluster[i]);
2462 master->cluster[i]->is_new = 1;
71c6c4c9 2463 master->cluster[i]->done = true;
2a863793
HV		 2464 }
2465 }
54c911eb 2466 ret = call_op(master, s_ctrl);
0996517c
HV		 2467 if (ret)
2468 break;
0996517c 2469 }
77e7c4e6 2470 mutex_unlock(hdl->lock);
0996517c
HV		 2471 return ret;
2472}
2473EXPORT_SYMBOL(v4l2_ctrl_handler_setup);
2474
d9a25471
HV		 2475/* Implement VIDIOC_QUERY_EXT_CTRL */
2476int v4l2_query_ext_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_query_ext_ctrl *qc)
0996517c 2477{
d9a25471 2478 const unsigned next_flags = V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND;
0996517c
HV		 2479 u32 id = qc->id & V4L2_CTRL_ID_MASK;
2480 struct v4l2_ctrl_ref *ref;
2481 struct v4l2_ctrl *ctrl;
2482
2483 if (hdl == NULL)
2484 return -EINVAL;
2485
77e7c4e6 2486 mutex_lock(hdl->lock);
0996517c
HV		 2487
2488 /* Try to find it */
2489 ref = find_ref(hdl, id);
2490
d9a25471
HV		 2491 if ((qc->id & next_flags) && !list_empty(&hdl->ctrl_refs)) {
2492 bool is_compound;
2493 /* Match any control that is not hidden */
2494 unsigned mask = 1;
2495 bool match = false;
2496
2497 if ((qc->id & next_flags) == V4L2_CTRL_FLAG_NEXT_COMPOUND) {
2498 /* Match any hidden control */
2499 match = true;
2500 } else if ((qc->id & next_flags) == next_flags) {
2501 /* Match any control, compound or not */
2502 mask = 0;
2503 }
2504
0996517c
HV		 2505 /* Find the next control with ID > qc->id */
2506
2507 /* Did we reach the end of the control list? */
2508 if (id >= node2id(hdl->ctrl_refs.prev)) {
2509 ref = NULL; /* Yes, so there is no next control */
2510 } else if (ref) {
2511 /* We found a control with the given ID, so just get
d9a25471
HV		 2512 the next valid one in the list. */
2513 list_for_each_entry_continue(ref, &hdl->ctrl_refs, node) {
35204e2e 2514 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2515 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2516 if (id < ref->ctrl->id &&
2517 (is_compound & mask) == match)
2518 break;
2519 }
2520 if (&ref->node == &hdl->ctrl_refs)
2521 ref = NULL;
0996517c
HV		 2522 } else {
2523 /* No control with the given ID exists, so start
2524 searching for the next largest ID. We know there
2525 is one, otherwise the first 'if' above would have
2526 been true. */
d9a25471 2527 list_for_each_entry(ref, &hdl->ctrl_refs, node) {
35204e2e 2528 is_compound = ref->ctrl->is_array ||
d9a25471
HV		 2529 ref->ctrl->type >= V4L2_CTRL_COMPOUND_TYPES;
2530 if (id < ref->ctrl->id &&
2531 (is_compound & mask) == match)
0996517c 2532 break;
d9a25471
HV		 2533 }
2534 if (&ref->node == &hdl->ctrl_refs)
2535 ref = NULL;
0996517c
HV		 2536 }
2537 }
77e7c4e6 2538 mutex_unlock(hdl->lock);
d9a25471 2539
0996517c
HV		 2540 if (!ref)
2541 return -EINVAL;
2542
2543 ctrl = ref->ctrl;
2544 memset(qc, 0, sizeof(*qc));
829fb2dc
HV		 2545 if (id >= V4L2_CID_PRIVATE_BASE)
2546 qc->id = id;
2547 else
2548 qc->id = ctrl->id;
0996517c 2549 strlcpy(qc->name, ctrl->name, sizeof(qc->name));
d9a25471
HV		 2550 qc->flags = ctrl->flags;
2551 qc->type = ctrl->type;
2552 if (ctrl->is_ptr)
2553 qc->flags |= V4L2_CTRL_FLAG_HAS_PAYLOAD;
2554 qc->elem_size = ctrl->elem_size;
20d88eef
HV		 2555 qc->elems = ctrl->elems;
2556 qc->nr_of_dims = ctrl->nr_of_dims;
2557 memcpy(qc->dims, ctrl->dims, qc->nr_of_dims * sizeof(qc->dims[0]));
0996517c
HV		 2558 qc->minimum = ctrl->minimum;
2559 qc->maximum = ctrl->maximum;
2560 qc->default_value = ctrl->default_value;
ce580fe5
SA		 2561 if (ctrl->type == V4L2_CTRL_TYPE_MENU
2562 || ctrl->type == V4L2_CTRL_TYPE_INTEGER_MENU)
0996517c
HV		 2563 qc->step = 1;
2564 else
2565 qc->step = ctrl->step;
d9a25471
HV		 2566 return 0;
2567}
2568EXPORT_SYMBOL(v4l2_query_ext_ctrl);
2569
2570/* Implement VIDIOC_QUERYCTRL */
2571int v4l2_queryctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_queryctrl *qc)
2572{
2573 struct v4l2_query_ext_ctrl qec = { qc->id };
2574 int rc;
2575
2576 rc = v4l2_query_ext_ctrl(hdl, &qec);
2577 if (rc)
2578 return rc;
2579
2580 qc->id = qec.id;
2581 qc->type = qec.type;
2582 qc->flags = qec.flags;
2583 strlcpy(qc->name, qec.name, sizeof(qc->name));
2584 switch (qc->type) {
2585 case V4L2_CTRL_TYPE_INTEGER:
2586 case V4L2_CTRL_TYPE_BOOLEAN:
2587 case V4L2_CTRL_TYPE_MENU:
2588 case V4L2_CTRL_TYPE_INTEGER_MENU:
2589 case V4L2_CTRL_TYPE_STRING:
2590 case V4L2_CTRL_TYPE_BITMASK:
2591 qc->minimum = qec.minimum;
2592 qc->maximum = qec.maximum;
2593 qc->step = qec.step;
2594 qc->default_value = qec.default_value;
2595 break;
2596 default:
2597 qc->minimum = 0;
2598 qc->maximum = 0;
2599 qc->step = 0;
2600 qc->default_value = 0;
2601 break;
2602 }
0996517c
HV		 2603 return 0;
2604}
2605EXPORT_SYMBOL(v4l2_queryctrl);
2606
2607int v4l2_subdev_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
2608{
d9a25471 2609 if (qc->id & (V4L2_CTRL_FLAG_NEXT_CTRL | V4L2_CTRL_FLAG_NEXT_COMPOUND))
87a0c94c 2610 return -EINVAL;
0996517c
HV		 2611 return v4l2_queryctrl(sd->ctrl_handler, qc);
2612}
2613EXPORT_SYMBOL(v4l2_subdev_queryctrl);
2614
2615/* Implement VIDIOC_QUERYMENU */
2616int v4l2_querymenu(struct v4l2_ctrl_handler *hdl, struct v4l2_querymenu *qm)
2617{
2618 struct v4l2_ctrl *ctrl;
2619 u32 i = qm->index;
2620
2621 ctrl = v4l2_ctrl_find(hdl, qm->id);
2622 if (!ctrl)
2623 return -EINVAL;
2624
2625 qm->reserved = 0;
2626 /* Sanity checks */
ce580fe5
SA		 2627 switch (ctrl->type) {
2628 case V4L2_CTRL_TYPE_MENU:
2629 if (ctrl->qmenu == NULL)
2630 return -EINVAL;
2631 break;
2632 case V4L2_CTRL_TYPE_INTEGER_MENU:
2633 if (ctrl->qmenu_int == NULL)
2634 return -EINVAL;
2635 break;
2636 default:
2637 return -EINVAL;
2638 }
2639
2640 if (i < ctrl->minimum || i > ctrl->maximum)
0996517c 2641 return -EINVAL;
ce580fe5 2642
0996517c
HV		 2643 /* Use mask to see if this menu item should be skipped */
2644 if (ctrl->menu_skip_mask & (1 << i))
2645 return -EINVAL;
2646 /* Empty menu items should also be skipped */
ce580fe5
SA		 2647 if (ctrl->type == V4L2_CTRL_TYPE_MENU) {
2648 if (ctrl->qmenu[i] == NULL || ctrl->qmenu[i][0] == '\0')
2649 return -EINVAL;
2650 strlcpy(qm->name, ctrl->qmenu[i], sizeof(qm->name));
2651 } else {
2652 qm->value = ctrl->qmenu_int[i];
2653 }
0996517c
HV		 2654 return 0;
2655}
2656EXPORT_SYMBOL(v4l2_querymenu);
2657
2658int v4l2_subdev_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qm)
2659{
2660 return v4l2_querymenu(sd->ctrl_handler, qm);
2661}
2662EXPORT_SYMBOL(v4l2_subdev_querymenu);
2663
2664
2665
2666/* Some general notes on the atomic requirements of VIDIOC_G/TRY/S_EXT_CTRLS:
2667
2668 It is not a fully atomic operation, just best-effort only. After all, if
2669 multiple controls have to be set through multiple i2c writes (for example)
2670 then some initial writes may succeed while others fail. Thus leaving the
2671 system in an inconsistent state. The question is how much effort you are
2672 willing to spend on trying to make something atomic that really isn't.
2673
2674 From the point of view of an application the main requirement is that
2675 when you call VIDIOC_S_EXT_CTRLS and some values are invalid then an
2676 error should be returned without actually affecting any controls.
2677
2678 If all the values are correct, then it is acceptable to just give up
2679 in case of low-level errors.
2680
2681 It is important though that the application can tell when only a partial
2682 configuration was done. The way we do that is through the error_idx field
2683 of struct v4l2_ext_controls: if that is equal to the count field then no
2684 controls were affected. Otherwise all controls before that index were
2685 successful in performing their 'get' or 'set' operation, the control at
2686 the given index failed, and you don't know what happened with the controls
2687 after the failed one. Since if they were part of a control cluster they
2688 could have been successfully processed (if a cluster member was encountered
2689 at index < error_idx), they could have failed (if a cluster member was at
2690 error_idx), or they may not have been processed yet (if the first cluster
2691 member appeared after error_idx).
2692
2693 It is all fairly theoretical, though. In practice all you can do is to
2694 bail out. If error_idx == count, then it is an application bug. If
2695 error_idx < count then it is only an application bug if the error code was
2696 EBUSY. That usually means that something started streaming just when you
2697 tried to set the controls. In all other cases it is a driver/hardware
2698 problem and all you can do is to retry or bail out.
2699
2700 Note that these rules do not apply to VIDIOC_TRY_EXT_CTRLS: since that
2701 never modifies controls the error_idx is just set to whatever control
2702 has an invalid value.
2703 */
2704
2705/* Prepare for the extended g/s/try functions.
2706 Find the controls in the control array and do some basic checks. */
2707static int prepare_ext_ctrls(struct v4l2_ctrl_handler *hdl,
2708 struct v4l2_ext_controls *cs,
d9a25471
HV		 2709 struct v4l2_ctrl_helper *helpers,
2710 bool get)
0996517c 2711{
eb5b16ef
HV		 2712 struct v4l2_ctrl_helper *h;
2713 bool have_clusters = false;
0996517c
HV		 2714 u32 i;
2715
eb5b16ef 2716 for (i = 0, h = helpers; i < cs->count; i++, h++) {
0996517c 2717 struct v4l2_ext_control *c = &cs->controls[i];
eb5b16ef 2718 struct v4l2_ctrl_ref *ref;
0996517c
HV		 2719 struct v4l2_ctrl *ctrl;
2720 u32 id = c->id & V4L2_CTRL_ID_MASK;
2721
37cd3b73 2722 cs->error_idx = i;
0996517c 2723
953eae5d
RR		 2724 if (cs->which &&
2725 cs->which != V4L2_CTRL_WHICH_DEF_VAL &&
2726 V4L2_CTRL_ID2WHICH(id) != cs->which)
0996517c
HV		 2727 return -EINVAL;
2728
2729 /* Old-style private controls are not allowed for
2730 extended controls */
2731 if (id >= V4L2_CID_PRIVATE_BASE)
2732 return -EINVAL;
eb5b16ef
HV		 2733 ref = find_ref_lock(hdl, id);
2734 if (ref == NULL)
0996517c 2735 return -EINVAL;
eb5b16ef 2736 ctrl = ref->ctrl;
0996517c
HV		 2737 if (ctrl->flags & V4L2_CTRL_FLAG_DISABLED)
2738 return -EINVAL;
2739
eb5b16ef
HV		 2740 if (ctrl->cluster[0]->ncontrols > 1)
2741 have_clusters = true;
2742 if (ctrl->cluster[0] != ctrl)
2743 ref = find_ref_lock(hdl, ctrl->cluster[0]->id);
302ab7ce
HV		 2744 if (ctrl->is_ptr && !ctrl->is_string) {
2745 unsigned tot_size = ctrl->elems * ctrl->elem_size;
2746
2747 if (c->size < tot_size) {
2748 if (get) {
2749 c->size = tot_size;
2750 return -ENOSPC;
2751 }
2752 return -EFAULT;
d9a25471 2753 }
302ab7ce 2754 c->size = tot_size;
d9a25471 2755 }
eb5b16ef
HV		 2756 /* Store the ref to the master control of the cluster */
2757 h->mref = ref;
2758 h->ctrl = ctrl;
2759 /* Initially set next to 0, meaning that there is no other
2760 control in this helper array belonging to the same
2761 cluster */
2762 h->next = 0;
0996517c 2763 }
0996517c 2764
eb5b16ef
HV		 2765 /* We are done if there were no controls that belong to a multi-
2766 control cluster. */
2767 if (!have_clusters)
2768 return 0;
0996517c 2769
eb5b16ef
HV		 2770 /* The code below figures out in O(n) time which controls in the list
2771 belong to the same cluster. */
0996517c 2772
eb5b16ef 2773 /* This has to be done with the handler lock taken. */
77e7c4e6 2774 mutex_lock(hdl->lock);
0996517c 2775
eb5b16ef
HV		 2776 /* First zero the helper field in the master control references */
2777 for (i = 0; i < cs->count; i++)
c082266f 2778 helpers[i].mref->helper = NULL;
eb5b16ef
HV		 2779 for (i = 0, h = helpers; i < cs->count; i++, h++) {
2780 struct v4l2_ctrl_ref *mref = h->mref;
2781
2782 /* If the mref->helper is set, then it points to an earlier
2783 helper that belongs to the same cluster. */
2784 if (mref->helper) {
2785 /* Set the next field of mref->helper to the current
2786 index: this means that that earlier helper now
2787 points to the next helper in the same cluster. */
2788 mref->helper->next = i;
2789 /* mref should be set only for the first helper in the
2790 cluster, clear the others. */
2791 h->mref = NULL;
2792 }
2793 /* Point the mref helper to the current helper struct. */
2794 mref->helper = h;
0996517c 2795 }
77e7c4e6 2796 mutex_unlock(hdl->lock);
eb5b16ef 2797 return 0;
0996517c
HV		 2798}
2799
2800/* Handles the corner case where cs->count == 0. It checks whether the
2801 specified control class exists. If that class ID is 0, then it checks
2802 whether there are any controls at all. */
0f8017be 2803static int class_check(struct v4l2_ctrl_handler *hdl, u32 which)
0996517c 2804{
953eae5d 2805 if (which == 0 || which == V4L2_CTRL_WHICH_DEF_VAL)
0996517c 2806 return list_empty(&hdl->ctrl_refs) ? -EINVAL : 0;
0f8017be 2807 return find_ref_lock(hdl, which | 1) ? 0 : -EINVAL;
0996517c
HV		 2808}
2809
2810
2811
2812/* Get extended controls. Allocates the helpers array if needed. */
2813int v4l2_g_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
2814{
eb5b16ef
HV		 2815 struct v4l2_ctrl_helper helper[4];
2816 struct v4l2_ctrl_helper *helpers = helper;
0996517c 2817 int ret;
ddac5c10 2818 int i, j;
953eae5d
RR		 2819 bool def_value;
2820
2821 def_value = (cs->which == V4L2_CTRL_WHICH_DEF_VAL);
0996517c
HV		 2822
2823 cs->error_idx = cs->count;
0f8017be 2824 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
0996517c
HV		 2825
2826 if (hdl == NULL)
2827 return -EINVAL;
2828
2829 if (cs->count == 0)
0f8017be 2830 return class_check(hdl, cs->which);
0996517c
HV		 2831
2832 if (cs->count > ARRAY_SIZE(helper)) {
5f0049bd
XW		 2833 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
2834 GFP_KERNEL);
0996517c
HV		 2835 if (helpers == NULL)
2836 return -ENOMEM;
2837 }
2838
d9a25471 2839 ret = prepare_ext_ctrls(hdl, cs, helpers, true);
37cd3b73 2840 cs->error_idx = cs->count;
0996517c
HV		 2841
2842 for (i = 0; !ret && i < cs->count; i++)
2843 if (helpers[i].ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2844 ret = -EACCES;
2845
2846 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef 2847 int (*ctrl_to_user)(struct v4l2_ext_control *c,
953eae5d 2848 struct v4l2_ctrl *ctrl);
eb5b16ef 2849 struct v4l2_ctrl *master;
0996517c 2850
953eae5d
RR		 2851 ctrl_to_user = def_value ? def_to_user : cur_to_user;
2852
eb5b16ef 2853 if (helpers[i].mref == NULL)
0996517c
HV		 2854 continue;
2855
eb5b16ef 2856 master = helpers[i].mref->ctrl;
0996517c
HV		 2857 cs->error_idx = i;
2858
2859 v4l2_ctrl_lock(master);
ddac5c10
HV		 2860
2861 /* g_volatile_ctrl will update the new control values */
953eae5d
RR		 2862 if (!def_value &&
2863 ((master->flags & V4L2_CTRL_FLAG_VOLATILE) ||
2864 (master->has_volatiles && !is_cur_manual(master)))) {
ddac5c10
HV		 2865 for (j = 0; j < master->ncontrols; j++)
2866 cur_to_new(master->cluster[j]);
54c911eb 2867 ret = call_op(master, g_volatile_ctrl);
eb5b16ef 2868 ctrl_to_user = new_to_user;
ddac5c10
HV		 2869 }
2870 /* If OK, then copy the current (for non-volatile controls)
2871 or the new (for volatile controls) control values to the
2872 caller */
eb5b16ef
HV		 2873 if (!ret) {
2874 u32 idx = i;
2875
2876 do {
2877 ret = ctrl_to_user(cs->controls + idx,
2878 helpers[idx].ctrl);
2879 idx = helpers[idx].next;
2880 } while (!ret && idx);
2881 }
0996517c 2882 v4l2_ctrl_unlock(master);
0996517c
HV		 2883 }
2884
2885 if (cs->count > ARRAY_SIZE(helper))
2886 kfree(helpers);
2887 return ret;
2888}
2889EXPORT_SYMBOL(v4l2_g_ext_ctrls);
2890
2891int v4l2_subdev_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
2892{
2893 return v4l2_g_ext_ctrls(sd->ctrl_handler, cs);
2894}
2895EXPORT_SYMBOL(v4l2_subdev_g_ext_ctrls);
2896
2897/* Helper function to get a single control */
03d5285b 2898static int get_ctrl(struct v4l2_ctrl *ctrl, struct v4l2_ext_control *c)
0996517c
HV		 2899{
2900 struct v4l2_ctrl *master = ctrl->cluster[0];
2901 int ret = 0;
ddac5c10 2902 int i;
0996517c 2903
d9a25471 2904 /* Compound controls are not supported. The new_to_user() and
03d5285b
LP		 2905 * cur_to_user() calls below would need to be modified not to access
2906 * userspace memory when called from get_ctrl().
2907 */
a8077734 2908 if (!ctrl->is_int && ctrl->type != V4L2_CTRL_TYPE_INTEGER64)
03d5285b
LP		 2909 return -EINVAL;
2910
0996517c
HV		 2911 if (ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY)
2912 return -EACCES;
2913
2914 v4l2_ctrl_lock(master);
2915 /* g_volatile_ctrl will update the current control values */
5626b8c7 2916 if (ctrl->flags & V4L2_CTRL_FLAG_VOLATILE) {
ddac5c10
HV		 2917 for (i = 0; i < master->ncontrols; i++)
2918 cur_to_new(master->cluster[i]);
54c911eb 2919 ret = call_op(master, g_volatile_ctrl);
03d5285b 2920 new_to_user(c, ctrl);
ddac5c10 2921 } else {
03d5285b 2922 cur_to_user(c, ctrl);
ddac5c10 2923 }
0996517c
HV		 2924 v4l2_ctrl_unlock(master);
2925 return ret;
2926}
2927
2928int v4l2_g_ctrl(struct v4l2_ctrl_handler *hdl, struct v4l2_control *control)
2929{
2930 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
03d5285b
LP		 2931 struct v4l2_ext_control c;
2932 int ret;
0996517c 2933
d9a25471 2934 if (ctrl == NULL || !ctrl->is_int)
0996517c 2935 return -EINVAL;
03d5285b
LP		 2936 ret = get_ctrl(ctrl, &c);
2937 control->value = c.value;
2938 return ret;
0996517c
HV		 2939}
2940EXPORT_SYMBOL(v4l2_g_ctrl);
2941
2942int v4l2_subdev_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
2943{
2944 return v4l2_g_ctrl(sd->ctrl_handler, control);
2945}
2946EXPORT_SYMBOL(v4l2_subdev_g_ctrl);
2947
2948s32 v4l2_ctrl_g_ctrl(struct v4l2_ctrl *ctrl)
2949{
03d5285b 2950 struct v4l2_ext_control c;
0996517c
HV		 2951
2952 /* It's a driver bug if this happens. */
d9a25471 2953 WARN_ON(!ctrl->is_int);
03d5285b
LP		 2954 c.value = 0;
2955 get_ctrl(ctrl, &c);
2956 return c.value;
0996517c
HV		 2957}
2958EXPORT_SYMBOL(v4l2_ctrl_g_ctrl);
2959
03d5285b
LP		 2960s64 v4l2_ctrl_g_ctrl_int64(struct v4l2_ctrl *ctrl)
2961{
2962 struct v4l2_ext_control c;
2963
2964 /* It's a driver bug if this happens. */
998e7659 2965 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
a8077734 2966 c.value64 = 0;
03d5285b 2967 get_ctrl(ctrl, &c);
a8077734 2968 return c.value64;
03d5285b
LP		 2969}
2970EXPORT_SYMBOL(v4l2_ctrl_g_ctrl_int64);
2971
0996517c
HV		 2972
2973/* Core function that calls try/s_ctrl and ensures that the new value is
2974 copied to the current value on a set.
2975 Must be called with ctrl->handler->lock held. */
2ccbe779
SN		 2976static int try_or_set_cluster(struct v4l2_fh *fh, struct v4l2_ctrl *master,
2977 bool set, u32 ch_flags)
0996517c 2978{
72d877ca 2979 bool update_flag;
eb5b16ef 2980 int ret;
0996517c
HV		 2981 int i;
2982
2983 /* Go through the cluster and either validate the new value or
2984 (if no new value was set), copy the current value to the new
2985 value, ensuring a consistent view for the control ops when
2986 called. */
eb5b16ef 2987 for (i = 0; i < master->ncontrols; i++) {
0996517c
HV		 2988 struct v4l2_ctrl *ctrl = master->cluster[i];
2989
2990 if (ctrl == NULL)
2991 continue;
2992
eb5b16ef
HV		 2993 if (!ctrl->is_new) {
2994 cur_to_new(ctrl);
0996517c
HV		 2995 continue;
2996 }
eb5b16ef
HV		 2997 /* Check again: it may have changed since the
2998 previous check in try_or_set_ext_ctrls(). */
2999 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3000 return -EBUSY;
0996517c
HV		 3001 }
3002
eb5b16ef 3003 ret = call_op(master, try_ctrl);
0996517c
HV		 3004
3005 /* Don't set if there is no change */
72d877ca
HV		 3006 if (ret || !set || !cluster_changed(master))
3007 return ret;
3008 ret = call_op(master, s_ctrl);
72d877ca
HV		 3009 if (ret)
3010 return ret;
3011
eb5b16ef 3012 /* If OK, then make the new values permanent. */
72d877ca
HV		 3013 update_flag = is_cur_manual(master) != is_new_manual(master);
3014 for (i = 0; i < master->ncontrols; i++)
2ccbe779
SN		 3015 new_to_cur(fh, master->cluster[i], ch_flags |
3016 ((update_flag && i > 0) ? V4L2_EVENT_CTRL_CH_FLAGS : 0));
72d877ca 3017 return 0;
0996517c
HV		 3018}
3019
e6402585
HV		 3020/* Validate controls. */
3021static int validate_ctrls(struct v4l2_ext_controls *cs,
3022 struct v4l2_ctrl_helper *helpers, bool set)
0996517c 3023{
e6402585 3024 unsigned i;
0996517c
HV		 3025 int ret = 0;
3026
eb5b16ef 3027 cs->error_idx = cs->count;
0996517c
HV		 3028 for (i = 0; i < cs->count; i++) {
3029 struct v4l2_ctrl *ctrl = helpers[i].ctrl;
7a7f1ab3 3030 union v4l2_ctrl_ptr p_new;
0996517c 3031
e6402585 3032 cs->error_idx = i;
0996517c
HV		 3033
3034 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3035 return -EACCES;
3036 /* This test is also done in try_set_control_cluster() which
3037 is called in atomic context, so that has the final say,
3038 but it makes sense to do an up-front check as well. Once
3039 an error occurs in try_set_control_cluster() some other
3040 controls may have been set already and we want to do a
3041 best-effort to avoid that. */
3042 if (set && (ctrl->flags & V4L2_CTRL_FLAG_GRABBED))
3043 return -EBUSY;
7a7f1ab3
HV		 3044 /*
3045 * Skip validation for now if the payload needs to be copied
3046 * from userspace into kernelspace. We'll validate those later.
3047 */
3048 if (ctrl->is_ptr)
3049 continue;
3050 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3051 p_new.p_s64 = &cs->controls[i].value64;
3052 else
3053 p_new.p_s32 = &cs->controls[i].value;
3054 ret = validate_new(ctrl, p_new);
eb5b16ef
HV		 3055 if (ret)
3056 return ret;
0996517c 3057 }
e6402585
HV		 3058 return 0;
3059}
3060
5626b8c7
HV		 3061/* Obtain the current volatile values of an autocluster and mark them
3062 as new. */
3063static void update_from_auto_cluster(struct v4l2_ctrl *master)
3064{
3065 int i;
3066
759b26a1 3067 for (i = 1; i < master->ncontrols; i++)
5626b8c7
HV		 3068 cur_to_new(master->cluster[i]);
3069 if (!call_op(master, g_volatile_ctrl))
3070 for (i = 1; i < master->ncontrols; i++)
3071 if (master->cluster[i])
3072 master->cluster[i]->is_new = 1;
3073}
3074
e6402585
HV		 3075/* Try or try-and-set controls */
3076static int try_set_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3077 struct v4l2_ext_controls *cs,
3078 bool set)
3079{
3080 struct v4l2_ctrl_helper helper[4];
3081 struct v4l2_ctrl_helper *helpers = helper;
3082 unsigned i, j;
3083 int ret;
3084
3085 cs->error_idx = cs->count;
953eae5d
RR		 3086
3087 /* Default value cannot be changed */
3088 if (cs->which == V4L2_CTRL_WHICH_DEF_VAL)
3089 return -EINVAL;
3090
0f8017be 3091 cs->which = V4L2_CTRL_ID2WHICH(cs->which);
e6402585
HV		 3092
3093 if (hdl == NULL)
3094 return -EINVAL;
3095
3096 if (cs->count == 0)
0f8017be 3097 return class_check(hdl, cs->which);
0996517c 3098
e6402585 3099 if (cs->count > ARRAY_SIZE(helper)) {
0a3475eb
XW		 3100 helpers = kmalloc_array(cs->count, sizeof(helper[0]),
3101 GFP_KERNEL);
e6402585
HV		 3102 if (!helpers)
3103 return -ENOMEM;
3104 }
d9a25471 3105 ret = prepare_ext_ctrls(hdl, cs, helpers, false);
e6402585
HV		 3106 if (!ret)
3107 ret = validate_ctrls(cs, helpers, set);
3108 if (ret && set)
3109 cs->error_idx = cs->count;
0996517c 3110 for (i = 0; !ret && i < cs->count; i++) {
eb5b16ef
HV		 3111 struct v4l2_ctrl *master;
3112 u32 idx = i;
0996517c 3113
eb5b16ef 3114 if (helpers[i].mref == NULL)
0996517c
HV		 3115 continue;
3116
37cd3b73 3117 cs->error_idx = i;
eb5b16ef
HV		 3118 master = helpers[i].mref->ctrl;
3119 v4l2_ctrl_lock(master);
0996517c 3120
2a863793 3121 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3122 for (j = 0; j < master->ncontrols; j++)
3123 if (master->cluster[j])
2a863793 3124 master->cluster[j]->is_new = 0;
0996517c 3125
5626b8c7
HV		 3126 /* For volatile autoclusters that are currently in auto mode
3127 we need to discover if it will be set to manual mode.
3128 If so, then we have to copy the current volatile values
3129 first since those will become the new manual values (which
3130 may be overwritten by explicit new values from this set
3131 of controls). */
3132 if (master->is_auto && master->has_volatiles &&
3133 !is_cur_manual(master)) {
3134 /* Pick an initial non-manual value */
3135 s32 new_auto_val = master->manual_mode_value + 1;
3136 u32 tmp_idx = idx;
3137
3138 do {
3139 /* Check if the auto control is part of the
3140 list, and remember the new value. */
3141 if (helpers[tmp_idx].ctrl == master)
3142 new_auto_val = cs->controls[tmp_idx].value;
3143 tmp_idx = helpers[tmp_idx].next;
3144 } while (tmp_idx);
3145 /* If the new value == the manual value, then copy
3146 the current volatile values. */
3147 if (new_auto_val == master->manual_mode_value)
3148 update_from_auto_cluster(master);
3149 }
3150
0996517c 3151 /* Copy the new caller-supplied control values.
2a863793 3152 user_to_new() sets 'is_new' to 1. */
eb5b16ef 3153 do {
7a7f1ab3
HV		 3154 struct v4l2_ctrl *ctrl = helpers[idx].ctrl;
3155
3156 ret = user_to_new(cs->controls + idx, ctrl);
3157 if (!ret && ctrl->is_ptr)
3158 ret = validate_new(ctrl, ctrl->p_new);
eb5b16ef
HV		 3159 idx = helpers[idx].next;
3160 } while (!ret && idx);
0996517c
HV		 3161
3162 if (!ret)
2ccbe779 3163 ret = try_or_set_cluster(fh, master, set, 0);
0996517c
HV		 3164
3165 /* Copy the new values back to userspace. */
eb5b16ef
HV		 3166 if (!ret) {
3167 idx = i;
3168 do {
adf41b9b 3169 ret = new_to_user(cs->controls + idx,
e6402585 3170 helpers[idx].ctrl);
eb5b16ef
HV		 3171 idx = helpers[idx].next;
3172 } while (!ret && idx);
3173 }
3174 v4l2_ctrl_unlock(master);
0996517c 3175 }
0996517c 3176
0996517c
HV		 3177 if (cs->count > ARRAY_SIZE(helper))
3178 kfree(helpers);
3179 return ret;
3180}
3181
3182int v4l2_try_ext_ctrls(struct v4l2_ctrl_handler *hdl, struct v4l2_ext_controls *cs)
3183{
ab892bac 3184 return try_set_ext_ctrls(NULL, hdl, cs, false);
0996517c
HV		 3185}
3186EXPORT_SYMBOL(v4l2_try_ext_ctrls);
3187
ab892bac
HV		 3188int v4l2_s_ext_ctrls(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3189 struct v4l2_ext_controls *cs)
0996517c 3190{
ab892bac 3191 return try_set_ext_ctrls(fh, hdl, cs, true);
0996517c
HV		 3192}
3193EXPORT_SYMBOL(v4l2_s_ext_ctrls);
3194
3195int v4l2_subdev_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3196{
ab892bac 3197 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, false);
0996517c
HV		 3198}
3199EXPORT_SYMBOL(v4l2_subdev_try_ext_ctrls);
3200
3201int v4l2_subdev_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *cs)
3202{
ab892bac 3203 return try_set_ext_ctrls(NULL, sd->ctrl_handler, cs, true);
0996517c
HV		 3204}
3205EXPORT_SYMBOL(v4l2_subdev_s_ext_ctrls);
3206
3207/* Helper function for VIDIOC_S_CTRL compatibility */
7a7f1ab3 3208static int set_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl, u32 ch_flags)
0996517c
HV		 3209{
3210 struct v4l2_ctrl *master = ctrl->cluster[0];
7a7f1ab3 3211 int ret;
0996517c
HV		 3212 int i;
3213
2a863793 3214 /* Reset the 'is_new' flags of the cluster */
0996517c
HV		 3215 for (i = 0; i < master->ncontrols; i++)
3216 if (master->cluster[i])
2a863793 3217 master->cluster[i]->is_new = 0;
0996517c 3218
7a7f1ab3
HV		 3219 ret = validate_new(ctrl, ctrl->p_new);
3220 if (ret)
3221 return ret;
5d0360a4 3222
5626b8c7
HV		 3223 /* For autoclusters with volatiles that are switched from auto to
3224 manual mode we have to update the current volatile values since
3225 those will become the initial manual values after such a switch. */
3226 if (master->is_auto && master->has_volatiles && ctrl == master &&
5d0360a4 3227 !is_cur_manual(master) && ctrl->val == master->manual_mode_value)
5626b8c7 3228 update_from_auto_cluster(master);
03d5285b 3229
5d0360a4 3230 ctrl->is_new = 1;
2ccbe779
SN		 3231 return try_or_set_cluster(fh, master, true, ch_flags);
3232}
03d5285b 3233
2ccbe779
SN		 3234/* Helper function for VIDIOC_S_CTRL compatibility */
3235static int set_ctrl_lock(struct v4l2_fh *fh, struct v4l2_ctrl *ctrl,
3236 struct v4l2_ext_control *c)
3237{
7a7f1ab3 3238 int ret;
2ccbe779 3239
7a7f1ab3
HV		 3240 v4l2_ctrl_lock(ctrl);
3241 user_to_new(c, ctrl);
3242 ret = set_ctrl(fh, ctrl, 0);
3243 if (!ret)
3244 cur_to_user(c, ctrl);
3245 v4l2_ctrl_unlock(ctrl);
0996517c
HV		 3246 return ret;
3247}
3248
ab892bac
HV		 3249int v4l2_s_ctrl(struct v4l2_fh *fh, struct v4l2_ctrl_handler *hdl,
3250 struct v4l2_control *control)
0996517c
HV		 3251{
3252 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, control->id);
7a7f1ab3 3253 struct v4l2_ext_control c = { control->id };
03d5285b 3254 int ret;
0996517c 3255
d9a25471 3256 if (ctrl == NULL || !ctrl->is_int)
0996517c
HV		 3257 return -EINVAL;
3258
7ebbc39f
HV		 3259 if (ctrl->flags & V4L2_CTRL_FLAG_READ_ONLY)
3260 return -EACCES;
3261
03d5285b 3262 c.value = control->value;
2ccbe779 3263 ret = set_ctrl_lock(fh, ctrl, &c);
03d5285b
LP		 3264 control->value = c.value;
3265 return ret;
0996517c
HV		 3266}
3267EXPORT_SYMBOL(v4l2_s_ctrl);
3268
3269int v4l2_subdev_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *control)
3270{
ab892bac 3271 return v4l2_s_ctrl(NULL, sd->ctrl_handler, control);
0996517c
HV		 3272}
3273EXPORT_SYMBOL(v4l2_subdev_s_ctrl);
3274
0c4348ad 3275int __v4l2_ctrl_s_ctrl(struct v4l2_ctrl *ctrl, s32 val)
0996517c 3276{
0c4348ad 3277 lockdep_assert_held(ctrl->handler->lock);
03d5285b 3278
0996517c 3279 /* It's a driver bug if this happens. */
d9a25471 3280 WARN_ON(!ctrl->is_int);
5d0360a4 3281 ctrl->val = val;
7a7f1ab3 3282 return set_ctrl(NULL, ctrl, 0);
0996517c 3283}
0c4348ad 3284EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl);
6e239399 3285
0c4348ad 3286int __v4l2_ctrl_s_ctrl_int64(struct v4l2_ctrl *ctrl, s64 val)
03d5285b 3287{
0c4348ad 3288 lockdep_assert_held(ctrl->handler->lock);
03d5285b
LP		 3289
3290 /* It's a driver bug if this happens. */
998e7659 3291 WARN_ON(ctrl->is_ptr || ctrl->type != V4L2_CTRL_TYPE_INTEGER64);
5d0360a4 3292 *ctrl->p_new.p_s64 = val;
7a7f1ab3 3293 return set_ctrl(NULL, ctrl, 0);
03d5285b 3294}
0c4348ad 3295EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_int64);
03d5285b 3296
5d0360a4
HV		 3297int __v4l2_ctrl_s_ctrl_string(struct v4l2_ctrl *ctrl, const char *s)
3298{
3299 lockdep_assert_held(ctrl->handler->lock);
3300
3301 /* It's a driver bug if this happens. */
3302 WARN_ON(ctrl->type != V4L2_CTRL_TYPE_STRING);
3303 strlcpy(ctrl->p_new.p_char, s, ctrl->maximum + 1);
7a7f1ab3 3304 return set_ctrl(NULL, ctrl, 0);
5d0360a4
HV		 3305}
3306EXPORT_SYMBOL(__v4l2_ctrl_s_ctrl_string);
3307
8ac7a949
HV		 3308void v4l2_ctrl_notify(struct v4l2_ctrl *ctrl, v4l2_ctrl_notify_fnc notify, void *priv)
3309{
3310 if (ctrl == NULL)
3311 return;
3312 if (notify == NULL) {
3313 ctrl->call_notify = 0;
3314 return;
3315 }
3316 if (WARN_ON(ctrl->handler->notify && ctrl->handler->notify != notify))
3317 return;
3318 ctrl->handler->notify = notify;
3319 ctrl->handler->notify_priv = priv;
3320 ctrl->call_notify = 1;
3321}
3322EXPORT_SYMBOL(v4l2_ctrl_notify);
3323
5a573925 3324int __v4l2_ctrl_modify_range(struct v4l2_ctrl *ctrl,
0ba2aeb6 3325 s64 min, s64 max, u64 step, s64 def)
2ccbe779 3326{
95ad7ff3
RR		 3327 bool value_changed;
3328 bool range_changed = false;
302ab7ce 3329 int ret;
2ccbe779 3330
5a573925
SA		 3331 lockdep_assert_held(ctrl->handler->lock);
3332
2ccbe779
SN		 3333 switch (ctrl->type) {
3334 case V4L2_CTRL_TYPE_INTEGER:
0ba2aeb6 3335 case V4L2_CTRL_TYPE_INTEGER64:
2ccbe779
SN		 3336 case V4L2_CTRL_TYPE_BOOLEAN:
3337 case V4L2_CTRL_TYPE_MENU:
3338 case V4L2_CTRL_TYPE_INTEGER_MENU:
3339 case V4L2_CTRL_TYPE_BITMASK:
dda4a4d5
HV		 3340 case V4L2_CTRL_TYPE_U8:
3341 case V4L2_CTRL_TYPE_U16:
811c5081 3342 case V4L2_CTRL_TYPE_U32:
302ab7ce
HV		 3343 if (ctrl->is_array)
3344 return -EINVAL;
3345 ret = check_range(ctrl->type, min, max, step, def);
2ccbe779
SN		 3346 if (ret)
3347 return ret;
3348 break;
3349 default:
3350 return -EINVAL;
3351 }
95ad7ff3
RR		 3352 if ((ctrl->minimum != min) || (ctrl->maximum != max) ||
3353 (ctrl->step != step) || ctrl->default_value != def) {
3354 range_changed = true;
3355 ctrl->minimum = min;
3356 ctrl->maximum = max;
3357 ctrl->step = step;
3358 ctrl->default_value = def;
3359 }
7a7f1ab3
HV		 3360 cur_to_new(ctrl);
3361 if (validate_new(ctrl, ctrl->p_new)) {
3362 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
3363 *ctrl->p_new.p_s64 = def;
3364 else
3365 *ctrl->p_new.p_s32 = def;
3366 }
3367
3368 if (ctrl->type == V4L2_CTRL_TYPE_INTEGER64)
95ad7ff3 3369 value_changed = *ctrl->p_new.p_s64 != *ctrl->p_cur.p_s64;
7a7f1ab3 3370 else
95ad7ff3
RR		 3371 value_changed = *ctrl->p_new.p_s32 != *ctrl->p_cur.p_s32;
3372 if (value_changed)
7a7f1ab3 3373 ret = set_ctrl(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
95ad7ff3 3374 else if (range_changed)
2ccbe779 3375 send_event(NULL, ctrl, V4L2_EVENT_CTRL_CH_RANGE);
2ccbe779
SN		 3376 return ret;
3377}
5a573925 3378EXPORT_SYMBOL(__v4l2_ctrl_modify_range);
2ccbe779 3379
6e6d76cd 3380static int v4l2_ctrl_add_event(struct v4l2_subscribed_event *sev, unsigned elems)
6e239399 3381{
3e366149
HG		 3382 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3383
3384 if (ctrl == NULL)
3385 return -EINVAL;
3386
6e239399 3387 v4l2_ctrl_lock(ctrl);
77068d36 3388 list_add_tail(&sev->node, &ctrl->ev_subs);
6e239399 3389 if (ctrl->type != V4L2_CTRL_TYPE_CTRL_CLASS &&
77068d36 3390 (sev->flags & V4L2_EVENT_SUB_FL_SEND_INITIAL)) {
6e239399 3391 struct v4l2_event ev;
c12fcfd6 3392 u32 changes = V4L2_EVENT_CTRL_CH_FLAGS;
6e239399 3393
c12fcfd6
HV		 3394 if (!(ctrl->flags & V4L2_CTRL_FLAG_WRITE_ONLY))
3395 changes |= V4L2_EVENT_CTRL_CH_VALUE;
3396 fill_event(&ev, ctrl, changes);
6e6d76cd
HV		 3397 /* Mark the queue as active, allowing this initial
3398 event to be accepted. */
3399 sev->elems = elems;
77068d36 3400 v4l2_event_queue_fh(sev->fh, &ev);
6e239399
HV		 3401 }
3402 v4l2_ctrl_unlock(ctrl);
3e366149 3403 return 0;
6e239399 3404}
6e239399 3405
3e366149 3406static void v4l2_ctrl_del_event(struct v4l2_subscribed_event *sev)
6e239399 3407{
3e366149
HG		 3408 struct v4l2_ctrl *ctrl = v4l2_ctrl_find(sev->fh->ctrl_handler, sev->id);
3409
6e239399 3410 v4l2_ctrl_lock(ctrl);
77068d36 3411 list_del(&sev->node);
6e239399
HV		 3412 v4l2_ctrl_unlock(ctrl);
3413}
3e366149
HG		 3414
3415void v4l2_ctrl_replace(struct v4l2_event *old, const struct v4l2_event *new)
3416{
3417 u32 old_changes = old->u.ctrl.changes;
3418
3419 old->u.ctrl = new->u.ctrl;
3420 old->u.ctrl.changes |= old_changes;
3421}
3422EXPORT_SYMBOL(v4l2_ctrl_replace);
3423
3424void v4l2_ctrl_merge(const struct v4l2_event *old, struct v4l2_event *new)
3425{
3426 new->u.ctrl.changes |= old->u.ctrl.changes;
3427}
3428EXPORT_SYMBOL(v4l2_ctrl_merge);
3429
3430const struct v4l2_subscribed_event_ops v4l2_ctrl_sub_ev_ops = {
3431 .add = v4l2_ctrl_add_event,
3432 .del = v4l2_ctrl_del_event,
3433 .replace = v4l2_ctrl_replace,
3434 .merge = v4l2_ctrl_merge,
3435};
3436EXPORT_SYMBOL(v4l2_ctrl_sub_ev_ops);
e2ecb257
HV		 3437
3438int v4l2_ctrl_log_status(struct file *file, void *fh)
3439{
3440 struct video_device *vfd = video_devdata(file);
3441 struct v4l2_fh *vfh = file->private_data;
3442
3443 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) && vfd->v4l2_dev)
3444 v4l2_ctrl_handler_log_status(vfh->ctrl_handler,
3445 vfd->v4l2_dev->name);
3446 return 0;
3447}
3448EXPORT_SYMBOL(v4l2_ctrl_log_status);
a26243b0
HV		 3449
3450int v4l2_ctrl_subscribe_event(struct v4l2_fh *fh,
85f5fe39 3451 const struct v4l2_event_subscription *sub)
a26243b0
HV		 3452{
3453 if (sub->type == V4L2_EVENT_CTRL)
3e366149 3454 return v4l2_event_subscribe(fh, sub, 0, &v4l2_ctrl_sub_ev_ops);
a26243b0
HV		 3455 return -EINVAL;
3456}
3457EXPORT_SYMBOL(v4l2_ctrl_subscribe_event);
3458
22fa4279
SN		 3459int v4l2_ctrl_subdev_subscribe_event(struct v4l2_subdev *sd, struct v4l2_fh *fh,
3460 struct v4l2_event_subscription *sub)
3461{
3462 if (!sd->ctrl_handler)
3463 return -EINVAL;
3464 return v4l2_ctrl_subscribe_event(fh, sub);
3465}
3466EXPORT_SYMBOL(v4l2_ctrl_subdev_subscribe_event);
3467
a26243b0
HV		 3468unsigned int v4l2_ctrl_poll(struct file *file, struct poll_table_struct *wait)
3469{
3470 struct v4l2_fh *fh = file->private_data;
3471
3472 if (v4l2_event_pending(fh))
3473 return POLLPRI;
3474 poll_wait(file, &fh->wait, wait);
3475 return 0;
3476}
3477EXPORT_SYMBOL(v4l2_ctrl_poll);
Linux kernel - Deliverables
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